From 12e17243d8a1591bba5041da6e7df7a390da94a1 Mon Sep 17 00:00:00 2001 From: "Enrico Weigelt, metux IT consult" Date: Thu, 14 Jan 2021 11:11:27 +0100 Subject: of: base: improve error msg in of_phandle_iterator_next() Also print out the phandle ID on error message, as a debug aid. Signed-off-by: Enrico Weigelt, metux IT consult Link: https://lore.kernel.org/r/20210114101127.16580-1-info@metux.net Signed-off-by: Rob Herring --- drivers/of/base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/of') diff --git a/drivers/of/base.c b/drivers/of/base.c index 161a23631472..8a348f0d3c5e 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -1297,8 +1297,8 @@ int of_phandle_iterator_next(struct of_phandle_iterator *it) if (it->cells_name) { if (!it->node) { - pr_err("%pOF: could not find phandle\n", - it->parent); + pr_err("%pOF: could not find phandle %d\n", + it->parent, it->phandle); goto err; } -- cgit v1.2.3 From 86588296acbfb1591e92ba60221e95677ecadb43 Mon Sep 17 00:00:00 2001 From: KarimAllah Ahmed Date: Fri, 15 Jan 2021 11:45:43 +0000 Subject: fdt: Properly handle "no-map" field in the memory region Mark the memory region with NOMAP flag instead of completely removing it from the memory blocks. That makes the FDT handling consistent with the EFI memory map handling. Cc: Rob Herring Cc: Frank Rowand Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: KarimAllah Ahmed Signed-off-by: Quentin Perret Link: https://lore.kernel.org/r/20210115114544.1830068-2-qperret@google.com Signed-off-by: Rob Herring --- drivers/of/fdt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/of') diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index feb0f2d67fc5..427b534d60d2 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1147,7 +1147,7 @@ int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size, bool nomap) { if (nomap) - return memblock_remove(base, size); + return memblock_mark_nomap(base, size); return memblock_reserve(base, size); } -- cgit v1.2.3 From 8a5a75e5e9e55de1cef5d83ca3589cb4899193ef Mon Sep 17 00:00:00 2001 From: Nicolas Boichat Date: Fri, 15 Jan 2021 11:45:44 +0000 Subject: of/fdt: Make sure no-map does not remove already reserved regions If the device tree is incorrectly configured, and attempts to define a "no-map" reserved memory that overlaps with the kernel data/code, the kernel would crash quickly after boot, with no obvious clue about the nature of the issue. For example, this would happen if we have the kernel mapped at these addresses (from /proc/iomem): 40000000-41ffffff : System RAM 40080000-40dfffff : Kernel code 40e00000-411fffff : reserved 41200000-413e0fff : Kernel data And we declare a no-map shared-dma-pool region at a fixed address within that range: mem_reserved: mem_region { compatible = "shared-dma-pool"; reg = <0 0x40000000 0 0x01A00000>; no-map; }; To fix this, when removing memory regions at early boot (which is what "no-map" regions do), we need to make sure that the memory is not already reserved. If we do, __reserved_mem_reserve_reg will throw an error: [ 0.000000] OF: fdt: Reserved memory: failed to reserve memory for node 'mem_region': base 0x0000000040000000, size 26 MiB and the code that will try to use the region should also fail, later on. We do not do anything for non-"no-map" regions, as memblock explicitly allows reserved regions to overlap, and the commit that this fixes removed the check for that precise reason. [ qperret: fixed conflicts caused by the usage of memblock_mark_nomap ] Fixes: 094cb98179f19b7 ("of/fdt: memblock_reserve /memreserve/ regions in the case of partial overlap") Signed-off-by: Nicolas Boichat Reviewed-by: Stephen Boyd Signed-off-by: Quentin Perret Link: https://lore.kernel.org/r/20210115114544.1830068-3-qperret@google.com Signed-off-by: Rob Herring --- drivers/of/fdt.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/of') diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 427b534d60d2..dcc1dd96911a 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1146,8 +1146,16 @@ int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size) int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size, bool nomap) { - if (nomap) + if (nomap) { + /* + * If the memory is already reserved (by another region), we + * should not allow it to be marked nomap. + */ + if (memblock_is_region_reserved(base, size)) + return -EBUSY; + return memblock_mark_nomap(base, size); + } return memblock_reserve(base, size); } -- cgit v1.2.3 From 83c4a4eec06a8fc46fc68c437424f9c89e4d9c72 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 11 Feb 2021 17:27:44 -0600 Subject: of: Remove of_dev_{get,put}() of_dev_get() and of_dev_put are just wrappers for get_device()/put_device() on a platform_device. There's also already platform_device_{get,put}() wrappers for this purpose. Let's update the few users and remove of_dev_{get,put}(). Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: "David S. Miller" Cc: Jakub Kicinski Cc: Frank Rowand Cc: Patrice Chotard Cc: Felipe Balbi Cc: Julia Lawall Cc: Gilles Muller Cc: Nicolas Palix Cc: Michal Marek Cc: linuxppc-dev@lists.ozlabs.org Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-usb@vger.kernel.org Cc: cocci@systeme.lip6.fr Signed-off-by: Rob Herring Reviewed-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20210211232745.1498137-2-robh@kernel.org --- arch/powerpc/platforms/pseries/ibmebus.c | 4 ++-- drivers/net/ethernet/ibm/emac/core.c | 15 ++++++++------- drivers/of/device.c | 21 --------------------- drivers/of/platform.c | 4 ++-- drivers/of/unittest.c | 2 +- drivers/usb/dwc3/dwc3-st.c | 2 +- include/linux/of_device.h | 3 --- scripts/coccinelle/free/put_device.cocci | 1 - 8 files changed, 14 insertions(+), 38 deletions(-) (limited to 'drivers/of') diff --git a/arch/powerpc/platforms/pseries/ibmebus.c b/arch/powerpc/platforms/pseries/ibmebus.c index 8c6e509f6967..a15ab33646b3 100644 --- a/arch/powerpc/platforms/pseries/ibmebus.c +++ b/arch/powerpc/platforms/pseries/ibmebus.c @@ -355,12 +355,12 @@ static int ibmebus_bus_device_probe(struct device *dev) if (!drv->probe) return error; - of_dev_get(of_dev); + get_device(dev); if (of_driver_match_device(dev, dev->driver)) error = drv->probe(of_dev); if (error) - of_dev_put(of_dev); + put_device(dev); return error; } diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index c00b9097eeea..471be6ec7e8a 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -38,6 +38,7 @@ #include #include #include +#include #include #include @@ -2390,11 +2391,11 @@ static int emac_check_deps(struct emac_instance *dev, static void emac_put_deps(struct emac_instance *dev) { - of_dev_put(dev->mal_dev); - of_dev_put(dev->zmii_dev); - of_dev_put(dev->rgmii_dev); - of_dev_put(dev->mdio_dev); - of_dev_put(dev->tah_dev); + platform_device_put(dev->mal_dev); + platform_device_put(dev->zmii_dev); + platform_device_put(dev->rgmii_dev); + platform_device_put(dev->mdio_dev); + platform_device_put(dev->tah_dev); } static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action, @@ -2435,7 +2436,7 @@ static int emac_wait_deps(struct emac_instance *dev) for (i = 0; i < EMAC_DEP_COUNT; i++) { of_node_put(deps[i].node); if (err) - of_dev_put(deps[i].ofdev); + platform_device_put(deps[i].ofdev); } if (err == 0) { dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev; @@ -2444,7 +2445,7 @@ static int emac_wait_deps(struct emac_instance *dev) dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev; dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev; } - of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev); + platform_device_put(deps[EMAC_DEP_PREV_IDX].ofdev); return err; } diff --git a/drivers/of/device.c b/drivers/of/device.c index aedfaaafd3e7..9a748855b39d 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -33,27 +33,6 @@ const struct of_device_id *of_match_device(const struct of_device_id *matches, } EXPORT_SYMBOL(of_match_device); -struct platform_device *of_dev_get(struct platform_device *dev) -{ - struct device *tmp; - - if (!dev) - return NULL; - tmp = get_device(&dev->dev); - if (tmp) - return to_platform_device(tmp); - else - return NULL; -} -EXPORT_SYMBOL(of_dev_get); - -void of_dev_put(struct platform_device *dev) -{ - if (dev) - put_device(&dev->dev); -} -EXPORT_SYMBOL(of_dev_put); - int of_device_add(struct platform_device *ofdev) { BUG_ON(ofdev->dev.of_node == NULL); diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 79bd5f5a1bf1..020bf860c72c 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -687,7 +687,7 @@ static int of_platform_notify(struct notifier_block *nb, pdev_parent = of_find_device_by_node(rd->dn->parent); pdev = of_platform_device_create(rd->dn, NULL, pdev_parent ? &pdev_parent->dev : NULL); - of_dev_put(pdev_parent); + platform_device_put(pdev_parent); if (pdev == NULL) { pr_err("%s: failed to create for '%pOF'\n", @@ -712,7 +712,7 @@ static int of_platform_notify(struct notifier_block *nb, of_platform_device_destroy(&pdev->dev, &children_left); /* and put the reference of the find */ - of_dev_put(pdev); + platform_device_put(pdev); break; } diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index eb51bc147440..eb100627c186 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -1286,7 +1286,7 @@ static void __init of_unittest_platform_populate(void) unittest(pdev, "Could not create device for node '%pOFn'\n", grandchild); - of_dev_put(pdev); + platform_device_put(pdev); } } diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c index e733be840545..b06b7092b1a2 100644 --- a/drivers/usb/dwc3/dwc3-st.c +++ b/drivers/usb/dwc3/dwc3-st.c @@ -274,7 +274,7 @@ static int st_dwc3_probe(struct platform_device *pdev) dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev); of_node_put(child); - of_dev_put(child_pdev); + platform_device_put(child_pdev); /* * Configure the USB port as device or host according to the static diff --git a/include/linux/of_device.h b/include/linux/of_device.h index 937f32f6aecb..d7a407dfeecb 100644 --- a/include/linux/of_device.h +++ b/include/linux/of_device.h @@ -26,9 +26,6 @@ static inline int of_driver_match_device(struct device *dev, return of_match_device(drv->of_match_table, dev) != NULL; } -extern struct platform_device *of_dev_get(struct platform_device *dev); -extern void of_dev_put(struct platform_device *dev); - extern int of_device_add(struct platform_device *pdev); extern int of_device_register(struct platform_device *ofdev); extern void of_device_unregister(struct platform_device *ofdev); diff --git a/scripts/coccinelle/free/put_device.cocci b/scripts/coccinelle/free/put_device.cocci index 120921366e84..f09f1e79bfa6 100644 --- a/scripts/coccinelle/free/put_device.cocci +++ b/scripts/coccinelle/free/put_device.cocci @@ -21,7 +21,6 @@ id = of_find_device_by_node@p1(x) if (id == NULL || ...) { ... return ...; } ... when != put_device(&id->dev) when != platform_device_put(id) - when != of_dev_put(id) when != if (id) { ... put_device(&id->dev) ... } when != e1 = (T)id when != e1 = (T)(&id->dev) -- cgit v1.2.3