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v4l2-compliance sends a zeroed struct v4l2_streamparm in
v4l2-test-formats.cpp::testParmType(), and this results in a division by
0 in some gspca subdrivers:
divide error: 0000 [#1] SMP
Modules linked in: gspca_ov534 gspca_main ...
CPU: 0 PID: 17201 Comm: v4l2-compliance Not tainted 4.3.0-rc2-ao2 #1
Hardware name: System manufacturer System Product Name/M2N-E SLI, BIOS
ASUS M2N-E SLI ACPI BIOS Revision 1301 09/16/2010
task: ffff8800818306c0 ti: ffff880095c4c000 task.ti: ffff880095c4c000
RIP: 0010:[<ffffffffa079bd62>] [<ffffffffa079bd62>] sd_set_streamparm+0x12/0x60 [gspca_ov534]
RSP: 0018:ffff880095c4fce8 EFLAGS: 00010296
RAX: 0000000000000000 RBX: ffff8800c9522000 RCX: ffffffffa077a140
RDX: 0000000000000000 RSI: ffff880095e0c100 RDI: ffff8800c9522000
RBP: ffff880095e0c100 R08: ffffffffa077a100 R09: 00000000000000cc
R10: ffff880067ec7740 R11: 0000000000000016 R12: ffffffffa07bb400
R13: 0000000000000000 R14: ffff880081b6a800 R15: 0000000000000000
FS: 00007fda0de78740(0000) GS:ffff88012fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014630f8 CR3: 00000000cf349000 CR4: 00000000000006f0
Stack:
ffffffffa07a6431 ffff8800c9522000 ffffffffa077656e 00000000c0cc5616
ffff8800c9522000 ffffffffa07a5e20 ffff880095e0c100 0000000000000000
ffff880067ec7740 ffffffffa077a140 ffff880067ec7740 0000000000000016
Call Trace:
[<ffffffffa07a6431>] ? v4l_s_parm+0x21/0x50 [videodev]
[<ffffffffa077656e>] ? vidioc_s_parm+0x4e/0x60 [gspca_main]
[<ffffffffa07a5e20>] ? __video_do_ioctl+0x280/0x2f0 [videodev]
[<ffffffffa07a5ba0>] ? video_ioctl2+0x20/0x20 [videodev]
[<ffffffffa07a59b9>] ? video_usercopy+0x319/0x4e0 [videodev]
[<ffffffff81182dc1>] ? page_add_new_anon_rmap+0x71/0xa0
[<ffffffff811afb92>] ? mem_cgroup_commit_charge+0x52/0x90
[<ffffffff81179b18>] ? handle_mm_fault+0xc18/0x1680
[<ffffffffa07a15cc>] ? v4l2_ioctl+0xac/0xd0 [videodev]
[<ffffffff811c846f>] ? do_vfs_ioctl+0x28f/0x480
[<ffffffff811c86d4>] ? SyS_ioctl+0x74/0x80
[<ffffffff8154a8b6>] ? entry_SYSCALL_64_fastpath+0x16/0x75
Code: c7 93 d9 79 a0 5b 5d e9 f1 f3 9a e0 0f 1f 00 66 2e 0f 1f 84 00
00 00 00 00 66 66 66 66 90 53 31 d2 48 89 fb 48 83 ec 08 8b 46 10 <f7>
76 0c 80 bf ac 0c 00 00 00 88 87 4e 0e 00 00 74 09 80 bf 4f
RIP [<ffffffffa079bd62>] sd_set_streamparm+0x12/0x60 [gspca_ov534]
RSP <ffff880095c4fce8>
---[ end trace 279710c2c6c72080 ]---
Following what the doc says about a zeroed timeperframe (see
http://www.linuxtv.org/downloads/v4l-dvb-apis/vidioc-g-parm.html):
...
To reset manually applications can just set this field to zero.
fix the issue by resetting the frame rate to a default value in case of
an unusable timeperframe.
The fix is done in the subdrivers instead of gspca.c because only the
subdrivers have notion of a default frame rate to reset the camera to.
Signed-off-by: Antonio Ospite <ao2@ao2.it>
Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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The cos table used at fixp-arith.h has only 8 bits of precision.
That causes problems if it is reused on other drivers.
As some media drivers require a higher precision sin/cos
implementation, replace the current implementation by one that
will provide 32 bits precision.
The values generated by the new implementation matches the
32 bit precision of glibc's sin for an angle measured in
integer degrees.
It also provides support for fractional angles via linear
interpolation. On experimental calculus, when used a table
with a 0.001 degree angle, the maximum error for sin is
0.000038, which is likely good enough for practical purposes.
There are some logic there that seems to be specific to the
usage inside ff-memless.c. Move those logic to there, as they're
not needed elsewhere.
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Prashant Laddha <prladdha@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Add support in the PS3 Eye driver for QVGA capture at higher
frame rates: 187, 150, and 137 FPS. This functionality is valuable
because the PS3 Eye is popular for computer vision projects and no
other camera in its price range supports such high frame rates.
Correct a QVGA mode that was listed as 40 FPS. It is really 37 FPS
(half of 75 FPS).
Tests confirm that the nominal frame rates are achieved.
Signed-off-by: Joe Howse <josephhowse@nummist.com>
Tested-by: Antonio Ospite <ao2@ao2.it>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Store complete current mode (struct v4l2_pix_format) in struct gspca_dev
instead of separate pixfmt, width and height parameters.
This is a preparation for variable resolution support.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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sd_start() operates on device controls but after the conversion to the
v4l2 control framework in commits 62bba5d and 1bd7d6a controls are
initialized in sd_init_controls() which is called _after_ sd_init():
The change fixes a NULL pointer dereference for Hercules Blog Webcam;
the problem is observable since 3.6:
gspca_main: v2.14.0 registered
gspca_main: ov534-2.14.0 probing 06f8:3002
BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
IP: [<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
PGD 0
Oops: 0000 [#1] SMP
Modules linked in: gspca_ov534(+) gspca_main videodev rfcomm bnep ppdev bluetooth binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek stir4200 irda crc_ccitt usblp snd_hda_intel snd_hda_codec snd_hwdep snd_pcm hid_generic snd_page_alloc snd_seq_midi snd_seq_midi_event usbhid snd_rawmidi snd_seq snd_seq_device snd_timer hid i915 snd psmouse drm_kms_helper serio_raw mei_me drm mei soundcore video i2c_algo_bit lpc_ich mac_hid coretemp lp parport firewire_ohci firewire_core crc_itu_t ahci libahci alx mdio r8169 mii [last unloaded: parport_pc]
CPU: 3 PID: 4352 Comm: modprobe Not tainted 3.11.0-031100rc2-generic #201307211535
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-DS3H, BIOS F9 09/19/2012
task: ffff8801c20f9770 ti: ffff8801ceaa0000 task.ti: ffff8801ceaa0000
RIP: 0010:[<ffffffffa03c1b01>] [<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
RSP: 0018:ffff8801ceaa1af8 EFLAGS: 00010292
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 000000000001988b
RDX: 000000000001988a RSI: ffffffffa032745a RDI: 0000000000000000
RBP: ffff8801ceaa1b28 R08: 0000000000017380 R09: ffffea0008419d80
R10: ffffffff81538f5a R11: 0000000000000002 R12: ffffffffa03273dc
R13: ffffffffa03273dc R14: 0000000000000000 R15: ffffffffa03270a0
FS: 00007f72d564a740(0000) GS:ffff88021f380000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000050 CR3: 00000001bd1f0000 CR4: 00000000001407e0
Stack:
ffff8801ceaa1b28 ffffffffa0325cff ffff8801000001f4 ffff8801ceb44000
ffffffffa03273dc ffff8801ceb44000 ffff8801ceaa1b58 ffffffffa032688e
ffff8801ceb44000 ffffffffa03274f0 ffffffffa03274f0 ffff8801ceb44380
Call Trace:
[<ffffffffa0325cff>] ? sccb_w_array+0x3f/0x80 [gspca_ov534]
[<ffffffffa032688e>] sd_start+0xce/0x2b0 [gspca_ov534]
[<ffffffffa0326bf9>] sd_init+0x189/0x1e8 [gspca_ov534]
[<ffffffffa02a0c95>] gspca_dev_probe2+0x285/0x410 [gspca_main]
[<ffffffffa02a0e58>] gspca_dev_probe+0x38/0x60 [gspca_main]
[<ffffffffa0325081>] sd_probe+0x21/0x30 [gspca_ov534]
[<ffffffff8153c960>] usb_probe_interface+0x1c0/0x2f0
[<ffffffff8148758c>] really_probe+0x6c/0x330
[<ffffffff814879d7>] driver_probe_device+0x47/0xa0
[<ffffffff81487adb>] __driver_attach+0xab/0xb0
[<ffffffff81487a30>] ? driver_probe_device+0xa0/0xa0
[<ffffffff814857be>] bus_for_each_dev+0x5e/0x90
[<ffffffff8148714e>] driver_attach+0x1e/0x20
[<ffffffff81486bdc>] bus_add_driver+0x10c/0x290
[<ffffffff8148805d>] driver_register+0x7d/0x160
[<ffffffff8153b590>] usb_register_driver+0xa0/0x160
[<ffffffffa0067000>] ? 0xffffffffa0066fff
[<ffffffffa006701e>] sd_driver_init+0x1e/0x1000 [gspca_ov534]
[<ffffffff8100212a>] do_one_initcall+0xfa/0x1b0
[<ffffffff810578c3>] ? set_memory_nx+0x43/0x50
[<ffffffff81712e8d>] do_init_module+0x80/0x1d1
[<ffffffff810d2079>] load_module+0x4c9/0x5f0
[<ffffffff810cf7b0>] ? add_kallsyms+0x210/0x210
[<ffffffff810d2254>] SyS_init_module+0xb4/0x100
[<ffffffff817333ef>] tracesys+0xe1/0xe6
Code: a0 09 00 00 48 c7 c7 30 c3 3c a0 e8 7a 38 ca e0 eb cf 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 28 <8b> 47 50 83 e8 05 83 f8 02 77 09 80 b8 20 8c 3c a0 00 74 1d 48
RIP [<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
RSP <ffff8801ceaa1af8>
CR2: 0000000000000050
---[ end trace 6786f15abfd2ac90 ]---
Original bug report from:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173723/
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Tested-by: Yaroslav Zakharuk <slavikz@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Instead use v4l2_dbg and v4l2_err. Note that the PDEBUG macro is kept to
make this patch-set less invasive, but it is simply a wrapper around
v4l2_dbg now. Most of the other changes are there to make the dev parameter
for the v4l2_xxx macros available everywhere we do logging.
Signed-off-by: Theodore Kilgore <kilgota@auburn.edu>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Rename all USB drivers with their own directory under
drivers/media/video into drivers/media/usb and update the
building system.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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