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2020-02-17EDAC/mc: Change mci device removal to use put_device()Robert Richter1-1/+0
There are dimm and csrow devices linked to the mci device esp. to show up in sysfs. It must be granted that children devices are removed before its mci parent. Thus, the release functions must be called in the correct order and may not miss any child before releasing its parent. In the current implementation this is only granted by the correct order of release functions. A much better approach is to use put_device() that releases the device only after all users are gone. It is the recommended way to release a device and free its memory. The function uses the device's refcount and only frees it if there are no users of it anymore such as children. So implement a mci_release() function to remove mci devices, use put_device() to free them and early initialize the mci device right after its struct has been allocated. Change the release function so that it can be universally used no matter if the device is registered or not. Since subsequent dimm and csrow sysfs links are implemented as children devices, their refcounts will keep the parent mci device from being removed as long as sysfs entries exist and until all users have been unregistered in edac_remove_sysfs_mci_device(). Remove edac_unregister_sysfs() and merge mci sysfs removal into edac_remove_sysfs_mci_device(). There is only a single instance now that removes the sysfs entries. The function can now be used in the error paths for cleanup. Also, create device release functions for all involved devices (dev->release), remove device_type release functions (dev_type-> release) and also use dev->init_name instead of dev_set_name(). [ bp: Massage commit message and comments. ] Signed-off-by: Robert Richter <rrichter@marvell.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Aristeu Rozanski <aris@redhat.com> Link: https://lkml.kernel.org/r/20200212120340.4764-5-rrichter@marvell.com
2019-08-29ARM: 8892/1: EDAC: Add missing debugfs_create_x32 wrapperJan Luebbe1-0/+4
We already have wrappers for x8 and x16, so add the missing x32 one. Signed-off-by: Jan Luebbe <jlu@pengutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2019-06-27EDAC: Fix global-out-of-bounds write when setting edac_mc_poll_msecEiichi Tsukata1-1/+1
Commit 9da21b1509d8 ("EDAC: Poll timeout cannot be zero, p2") assumes edac_mc_poll_msec to be unsigned long, but the type of the variable still remained as int. Setting edac_mc_poll_msec can trigger out-of-bounds write. Reproducer: # echo 1001 > /sys/module/edac_core/parameters/edac_mc_poll_msec KASAN report: BUG: KASAN: global-out-of-bounds in edac_set_poll_msec+0x140/0x150 Write of size 8 at addr ffffffffb91b2d00 by task bash/1996 CPU: 1 PID: 1996 Comm: bash Not tainted 5.2.0-rc6+ #23 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-2.fc30 04/01/2014 Call Trace: dump_stack+0xca/0x13e print_address_description.cold+0x5/0x246 __kasan_report.cold+0x75/0x9a ? edac_set_poll_msec+0x140/0x150 kasan_report+0xe/0x20 edac_set_poll_msec+0x140/0x150 ? dimmdev_location_show+0x30/0x30 ? vfs_lock_file+0xe0/0xe0 ? _raw_spin_lock+0x87/0xe0 param_attr_store+0x1b5/0x310 ? param_array_set+0x4f0/0x4f0 module_attr_store+0x58/0x80 ? module_attr_show+0x80/0x80 sysfs_kf_write+0x13d/0x1a0 kernfs_fop_write+0x2bc/0x460 ? sysfs_kf_bin_read+0x270/0x270 ? kernfs_notify+0x1f0/0x1f0 __vfs_write+0x81/0x100 vfs_write+0x1e1/0x560 ksys_write+0x126/0x250 ? __ia32_sys_read+0xb0/0xb0 ? do_syscall_64+0x1f/0x390 do_syscall_64+0xc1/0x390 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa7caa5e970 Code: 73 01 c3 48 8b 0d 28 d5 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 99 2d 2c 00 00 75 10 b8 01 00 00 00 04 RSP: 002b:00007fff6acfdfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fa7caa5e970 RDX: 0000000000000005 RSI: 0000000000e95c08 RDI: 0000000000000001 RBP: 0000000000e95c08 R08: 00007fa7cad1e760 R09: 00007fa7cb36a700 R10: 0000000000000073 R11: 0000000000000246 R12: 0000000000000005 R13: 0000000000000001 R14: 00007fa7cad1d600 R15: 0000000000000005 The buggy address belongs to the variable: edac_mc_poll_msec+0x0/0x40 Memory state around the buggy address: ffffffffb91b2c00: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa ffffffffb91b2c80: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa >ffffffffb91b2d00: 04 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa ^ ffffffffb91b2d80: 04 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 ffffffffb91b2e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Fix it by changing the type of edac_mc_poll_msec to unsigned int. The reason why this patch adopts unsigned int rather than unsigned long is msecs_to_jiffies() assumes arg to be unsigned int. We can avoid integer conversion bugs and unsigned int will be large enough for edac_mc_poll_msec. Reviewed-by: James Morse <james.morse@arm.com> Fixes: 9da21b1509d8 ("EDAC: Poll timeout cannot be zero, p2") Signed-off-by: Eiichi Tsukata <devel@etsukata.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2019-06-20EDAC: Make edac_debugfs_create_x*() return voidGreg Kroah-Hartman1-10/+8
The return values of edac_debugfs_create_x16() and edac_debugfs_create_x8() are never checked (as they don't need to be), so no need to have them return anything, just make the functions return void instead. This is done with the goal of being able to change the debugfs_create_x* functions to also not return a value. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: James Morse <james.morse@arm.com> Cc: linux-edac <linux-edac@vger.kernel.org> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Link: https://lkml.kernel.org/r/20190611175433.GA5108@kroah.com
2019-01-23EDAC: Do not check return value of debugfs_create() functionsGreg Kroah-Hartman1-4/+4
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. [ bp: Make edac_debugfs_init() return void too, while at it. ] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: James Morse <james.morse@arm.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-edac <linux-edac@vger.kernel.org> Link: https://lkml.kernel.org/r/20190122152151.16139-17-gregkh@linuxfoundation.org
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman1-0/+1
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15edac: rename edac_core.h to edac_mc.hMauro Carvalho Chehab1-1/+3
Now, all left at edac_core.h are at drivers/edac/edac_mc.c, so rename it to edac_mc.h. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2015-12-11EDAC: Rework workqueue handlingBorislav Petkov1-1/+6
Hide the EDAC workqueue pointer in a separate compilation unit and add accessors for the workqueue manipulations needed. Remove edac_pci_reset_delay_period() which wasn't used by anything. It seems it got added without a user with 91b99041c1d5 ("drivers/edac: updated PCI monitoring") Signed-off-by: Borislav Petkov <bp@suse.de>
2015-12-11EDAC: Make edac_device workqueue setup/teardown functions staticBorislav Petkov1-3/+0
They're not used anywhere else. Signed-off-by: Borislav Petkov <bp@suse.de>
2015-09-22EDAC: Add debugfs wrappersBorislav Petkov1-6/+28
Later patches will convert EDAC users to those. Signed-off-by: Borislav Petkov <bp@suse.de>
2015-09-22EDAC: Carve out debugfs functionalityBorislav Petkov1-0/+2
... into a separate compilation unit and drop a couple of CONFIG_EDAC_DEBUG ifdefferies. Rename edac_create_debug_nodes() to edac_create_debugfs_nodes(), while at it. No functionality change. Cc: <linux-edac@vger.kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de>
2015-02-23EDAC: Allow to pass driver-specific attribute groupsTakashi Iwai1-1/+2
Add edac_mc_add_mc_with_groups() for initializing the mem_ctl_info object with the optional attribute groups. This allows drivers to pass additional sysfs entries without manual (and racy) device_create_file() and co calls. edac_mc_add_mc() is kept as is, just calling edac_mc_add_with_groups() with NULL groups. Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: http://lkml.kernel.org/r/1423046938-18111-3-git-send-email-tiwai@suse.de Signed-off-by: Borislav Petkov <bp@suse.de>
2014-02-14EDAC: Poll timeout cannot be zero, p2Borislav Petkov1-1/+1
Sanitize code even more to accept unsigned longs only and to not allow polling intervals below 1 second as this is unnecessary and doesn't make much sense anyway for polling errors. Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1391457913-881-1-git-send-email-prarit@redhat.com Cc: Doug Thompson <dougthompson@xmission.com> Cc: <stable@vger.kernel.org>
2012-06-12edac: create top-level debugfs directoryRob Herring1-0/+14
Create a single, top-level "edac" directory for debugfs. An "mc[0-N]" directory is then created for each memory controller. Individual drivers can create additional entries such as h/w error injection control. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac_mc: Cleanup per-dimm_info debug messagesMauro Carvalho Chehab1-0/+3
The edac_mc_alloc() routine allocates one dimm_info device for all possible memories, including the non-filled ones. The debug messages there are somewhat confusing. So, cleans them, by moving the code that prints the memory location to edac_mc, and using it on both edac_mc_sysfs and edac_mc. Also, only dumps information when DIMM/ranks are actually filled. After this patch, a dimm-based memory controller will print the debug info as: [ 1011.380027] EDAC DEBUG: edac_mc_dump_csrow: csrow->csrow_idx = 0 [ 1011.380029] EDAC DEBUG: edac_mc_dump_csrow: csrow = ffff8801169be000 [ 1011.380031] EDAC DEBUG: edac_mc_dump_csrow: csrow->first_page = 0x0 [ 1011.380032] EDAC DEBUG: edac_mc_dump_csrow: csrow->last_page = 0x0 [ 1011.380034] EDAC DEBUG: edac_mc_dump_csrow: csrow->page_mask = 0x0 [ 1011.380035] EDAC DEBUG: edac_mc_dump_csrow: csrow->nr_channels = 3 [ 1011.380037] EDAC DEBUG: edac_mc_dump_csrow: csrow->channels = ffff8801149c2840 [ 1011.380039] EDAC DEBUG: edac_mc_dump_csrow: csrow->mci = ffff880117426000 [ 1011.380041] EDAC DEBUG: edac_mc_dump_channel: channel->chan_idx = 0 [ 1011.380042] EDAC DEBUG: edac_mc_dump_channel: channel = ffff8801149c2860 [ 1011.380044] EDAC DEBUG: edac_mc_dump_channel: channel->csrow = ffff8801169be000 [ 1011.380046] EDAC DEBUG: edac_mc_dump_channel: channel->dimm = ffff88010fe90400 ... [ 1011.380095] EDAC DEBUG: edac_mc_dump_dimm: dimm0: channel 0 slot 0 mapped as virtual row 0, chan 0 [ 1011.380097] EDAC DEBUG: edac_mc_dump_dimm: dimm = ffff88010fe90400 [ 1011.380099] EDAC DEBUG: edac_mc_dump_dimm: dimm->label = 'CPU#0Channel#0_DIMM#0' [ 1011.380101] EDAC DEBUG: edac_mc_dump_dimm: dimm->nr_pages = 0x40000 [ 1011.380103] EDAC DEBUG: edac_mc_dump_dimm: dimm->grain = 8 [ 1011.380104] EDAC DEBUG: edac_mc_dump_dimm: dimm->nr_pages = 0x40000 ... (a rank-based memory controller would print, instead of "dimm?", "rank?" on the above debug info) Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: rewrite the sysfs code to use struct deviceMauro Carvalho Chehab1-4/+5
The EDAC subsystem uses the old struct sysdev approach, creating all nodes using the raw sysfs API. This is bad, as the API is deprecated. As we'll be changing the EDAC API, let's first port the existing code to struct device. There's one drawback on this patch: driver-specific sysfs nodes, used by mpc85xx_edac, amd64_edac and i7core_edac won't be created anymore. While it would be possible to also port the device-specific code, that would mix kobj with struct device, with is not recommended. Also, it is easier and nicer to move the code to the drivers, instead, as the core can get rid of some complex logic that just emulates what the device_add() and device_create_file() already does. The next patches will convert the driver-specific code to use the device-specific calls. Then, the remaining bits of the old sysfs API will be removed. NOTE: a per-MC bus is required, otherwise devices with more than one memory controller will hit a bug like the one below: [ 819.094946] EDAC DEBUG: find_mci_by_dev: find_mci_by_dev() [ 819.094948] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device() idx=1 [ 819.094952] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device(): creating device mc1 [ 819.094967] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device creating dimm0, located at channel 0 slot 0 [ 819.094984] ------------[ cut here ]------------ [ 819.100142] WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xc1/0xf0() [ 819.107282] Hardware name: S2600CP [ 819.111078] sysfs: cannot create duplicate filename '/bus/edac/devices/dimm0' [ 819.119062] Modules linked in: sb_edac(+) edac_core ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables bridge stp llc sunrpc binfmt_misc dm_mirror dm_region_hash dm_log vhost_net macvtap macvlan tun kvm microcode pcspkr iTCO_wdt iTCO_vendor_support igb i2c_i801 i2c_core sg ioatdma dca sr_mod cdrom sd_mod crc_t10dif ahci libahci isci libsas libata scsi_transport_sas scsi_mod wmi dm_mod [last unloaded: scsi_wait_scan] [ 819.175748] Pid: 10902, comm: modprobe Not tainted 3.3.0-0.11.el7.v12.2.x86_64 #1 [ 819.184113] Call Trace: [ 819.186868] [<ffffffff8105adaf>] warn_slowpath_common+0x7f/0xc0 [ 819.193573] [<ffffffff8105aea6>] warn_slowpath_fmt+0x46/0x50 [ 819.200000] [<ffffffff811f53d1>] sysfs_add_one+0xc1/0xf0 [ 819.206025] [<ffffffff811f5cf5>] sysfs_do_create_link+0x135/0x220 [ 819.212944] [<ffffffff811f7023>] ? sysfs_create_group+0x13/0x20 [ 819.219656] [<ffffffff811f5df3>] sysfs_create_link+0x13/0x20 [ 819.226109] [<ffffffff813b04f6>] bus_add_device+0xe6/0x1b0 [ 819.232350] [<ffffffff813ae7cb>] device_add+0x2db/0x460 [ 819.238300] [<ffffffffa0325634>] edac_create_dimm_object+0x84/0xf0 [edac_core] [ 819.246460] [<ffffffffa0325e18>] edac_create_sysfs_mci_device+0xe8/0x290 [edac_core] [ 819.255215] [<ffffffffa0322e2a>] edac_mc_add_mc+0x5a/0x2c0 [edac_core] [ 819.262611] [<ffffffffa03412df>] sbridge_register_mci+0x1bc/0x279 [sb_edac] [ 819.270493] [<ffffffffa03417a3>] sbridge_probe+0xef/0x175 [sb_edac] [ 819.277630] [<ffffffff813ba4e8>] ? pm_runtime_enable+0x58/0x90 [ 819.284268] [<ffffffff812f430c>] local_pci_probe+0x5c/0xd0 [ 819.290508] [<ffffffff812f5ba1>] __pci_device_probe+0xf1/0x100 [ 819.297117] [<ffffffff812f5bea>] pci_device_probe+0x3a/0x60 [ 819.303457] [<ffffffff813b1003>] really_probe+0x73/0x270 [ 819.309496] [<ffffffff813b138e>] driver_probe_device+0x4e/0xb0 [ 819.316104] [<ffffffff813b149b>] __driver_attach+0xab/0xb0 [ 819.322337] [<ffffffff813b13f0>] ? driver_probe_device+0xb0/0xb0 [ 819.329151] [<ffffffff813af5d6>] bus_for_each_dev+0x56/0x90 [ 819.335489] [<ffffffff813b0d7e>] driver_attach+0x1e/0x20 [ 819.341534] [<ffffffff813b0980>] bus_add_driver+0x1b0/0x2a0 [ 819.347884] [<ffffffffa0347000>] ? 0xffffffffa0346fff [ 819.353641] [<ffffffff813b19f6>] driver_register+0x76/0x140 [ 819.359980] [<ffffffff8159f18b>] ? printk+0x51/0x53 [ 819.365524] [<ffffffffa0347000>] ? 0xffffffffa0346fff [ 819.371291] [<ffffffff812f5896>] __pci_register_driver+0x56/0xd0 [ 819.378096] [<ffffffffa0347054>] sbridge_init+0x54/0x1000 [sb_edac] [ 819.385231] [<ffffffff8100203f>] do_one_initcall+0x3f/0x170 [ 819.391577] [<ffffffff810bcd2e>] sys_init_module+0xbe/0x230 [ 819.397926] [<ffffffff815bb529>] system_call_fastpath+0x16/0x1b [ 819.404633] ---[ end trace 1654fdd39556689f ]--- This happens because the bus is not being properly initialized. Instead of putting the memory sub-devices inside the memory controller, it is putting everything under the same directory: $ tree /sys/bus/edac/ /sys/bus/edac/ ├── devices │ ├── all_channel_counts -> ../../../devices/system/edac/mc/mc0/all_channel_counts │ ├── csrow0 -> ../../../devices/system/edac/mc/mc0/csrow0 │ ├── csrow1 -> ../../../devices/system/edac/mc/mc0/csrow1 │ ├── csrow2 -> ../../../devices/system/edac/mc/mc0/csrow2 │ ├── dimm0 -> ../../../devices/system/edac/mc/mc0/dimm0 │ ├── dimm1 -> ../../../devices/system/edac/mc/mc0/dimm1 │ ├── dimm3 -> ../../../devices/system/edac/mc/mc0/dimm3 │ ├── dimm6 -> ../../../devices/system/edac/mc/mc0/dimm6 │ ├── inject_addrmatch -> ../../../devices/system/edac/mc/mc0/inject_addrmatch │ ├── mc -> ../../../devices/system/edac/mc │ └── mc0 -> ../../../devices/system/edac/mc/mc0 ├── drivers ├── drivers_autoprobe ├── drivers_probe └── uevent On a multi-memory controller system, the names "csrow%d" and "dimm%d" should be under "mc%d", and not at the main hierarchy level. So, we need to create a per-MC bus, in order to have its own namespace. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Greg K H <gregkh@linuxfoundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-29edac: rewrite edac_align_ptr()Mauro Carvalho Chehab1-1/+1
The edac_align_ptr() function is used to prepare data for a single memory allocation kzalloc() call. It counts how many bytes are needed by some data structure. Using it as-is is not that trivial, as the quantity of memory elements reserved is not there, but, instead, it is on a next call. In order to avoid mistakes when using it, move the number of allocated elements into it, making easier to use it. Reviewed-by: Borislav Petkov <bp@amd64.org> Cc: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-15edac: convert sysdev_class to a regular subsystemKay Sievers1-2/+0
After all sysdev classes are ported to regular driver core entities, the sysdev implementation will be entirely removed from the kernel. Cc: Doug Thompson <dougthompson@xmission.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi> Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-21EDAC: Export edac sysfs class to users.Borislav Petkov1-1/+0
Move toplevel sysfs class to the stub and make it available to non-modularized code too. Add proper refcounting of its users and move the registration functionality into the reference counting routines. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2008-04-29edac: remove unneeded functions and add static accessorAdrian Bunk1-1/+0
Collection of patches, merged into one, from Adrian that do the following: 1) This patch makes the following needlessly global functions static: - edac_pci_get_log_pe() - edac_pci_get_log_npe() - edac_pci_get_panic_on_pe() - edac_pci_unregister_sysfs_instance_kobj() - edac_pci_main_kobj_setup() 2) Remove unneeded function edac_device_find() 3) Added #if 0 around function edac_pci_find() 4) make the needlessly global edac_pci_generic_check() static 5) Removed function edac_check_mc_devices() Doug Thompson modified Adrian's patches, to bettern represent the direction of EDAC, and make them one patch. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-26drivers/edac: fix edac_pci sysfsDoug Thompson1-0/+6
This patch fixes sysfs exit code for the EDAC PCI device in a similiar manner and the previous fixes for EDAC_MC and EDAC_DEVICE. It removes the old (and incorrect) completion model and uses reference counts on per instance kobjects and on the edac core module. This pattern was applied to the edac_mc and edac_device code, but the EDAC PCI code was missed. In addition, this fixes a system hang after a low level driver was unloaded. (A cleanup function was called twice, which really screwed things up) Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-26drivers/edac: fix reset edac_mc pollmsecDoug Thompson1-0/+2
This fixes a deadlock that could occur on a 'setup' and 'teardown' sequence of the workq for a edac_mc control structure instance. A similiar fix was previously implemented for the edac_device code. In addition, the edac_mc device code there was missing code to allow the workq period valu to be altered via sysfs control. This patch adds that fix on the code, and allows for the changing of the period value as well. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: fix edac_device sysfs completion codeDouglas Thompson1-0/+4
With feedback, this patch corrects operation of the kobject release operation on kobjects, attributes and controls for the edac_device. Cc: Alan Cox alan@lxorguk.ukuu.org.uk Signed-off-by: Doug Thompson <dougthompson@xmission.com> Acked-by: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: fix edac_mc sysfs completion codeDoug Thompson1-2/+6
This patch refactors the 'releasing' of kobjects for the edac_mc type of device. The correct pattern of kobject release is followed. As internal kobjs are allocated they bump a ref count on the top level kobj. It in turn has a module ref count on the edac_core module. When internal kobjects are released, they dec the ref count on the top level kobj. When the top level kobj reaches zero, it decrements the ref count on the edac_core object, allow it to be unloaded, as all resources have all now been released. Cc: Alan Cox alan@lxorguk.ukuu.org.uk Signed-off-by: Doug Thompson <dougthompson@xmission.com> Acked-by: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: mod edac_align_ptr functionDouglas Thompson1-0/+1
Refactor the edac_align_ptr() function to reduce the noise of casting the aligned pointer to the various types of data objects and modified its callers to its new signature Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: core Lindent cleanupDouglas Thompson1-10/+6
Run the EDAC CORE files through Lindent for cleanup Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: mod PCI poll namesDave Jiang1-0/+7
Fixup poll values for MC and PCI. Also make mc function names unique to mc. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmissin.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: mod MC to use workq instead of kthreadDave Jiang1-2/+3
Move the memory controller object to work queue based implementation from the kernel thread based. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: add edac_device classDouglas Thompson1-0/+9
This patch adds the new 'class' of object to be managed, named: 'edac_device'. As a peer of the 'edac_mc' class of object, it provides a non-memory centric view of an ERROR DETECTING device in hardware. It provides a sysfs interface and an abstraction for varioius EDAC type devices. Multiple 'instances' within the class are possible, with each 'instance' able to have multiple 'blocks', and each 'block' having 'attributes'. At the 'block' level there are the 'ce_count' and 'ue_count' fields which the device driver can update and/or call edac_device_handle_XX() functions. At each higher level are additional 'total' count fields, which are a summation of counts below that level. This 'edac_device' has been used to capture and present ECC errors which are found in a a L1 and L2 system on a per CORE/CPU basis. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19drivers/edac: split out functions to unique filesDouglas Thompson1-0/+55
This is a large patch to refactor the original EDAC module in the kernel and to break it up into better file granularity, such that each source file contains a given subsystem of the EDAC CORE. Originally, the EDAC 'core' was contained in one source file: edac_mc.c with it corresponding edac_mc.h file. Now, there are the following files: edac_module.c The main module init/exit function and other overhead edac_mc.c Code handling the edac_mc class of object edac_mc_sysfs.c Code handling for sysfs presentation edac_pci_sysfs.c Code handling for PCI sysfs presentation edac_core.h CORE .h include file for 'edac_mc' and 'edac_device' drivers edac_module.h Internal CORE .h include file This forms a foundation upon which a later patch can create the 'edac_device' class of object code in a new file 'edac_device.c'. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>