linux-stable.git/drivers/gpio, branch linux-4.9.y Linux kernel stable tree gpio: amd8111: Fix PCI device reference count leak 2022-12-14T10:24:33+00:00 Xiongfeng Wang wangxiongfeng2@huawei.com 2022-11-22T12:35:08+00:00 4749c5cc147c9860b96db1e71cc36d1de1bd3f59 [ Upstream commit 45fecdb9f658d9c82960c98240bc0770ade19aca ] for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() after the 'out' label. Since pci_dev_put() can handle NULL input parameter, there is no problem for the 'Device not found' branch. For the normal path, add pci_dev_put() in amd_gpio_exit(). Fixes: f942a7de047d ("gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips") Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 45fecdb9f658d9c82960c98240bc0770ade19aca ]

for_each_pci_dev() is implemented by pci_get_device(). The comment of
pci_get_device() says that it will increase the reference count for the
returned pci_dev and also decrease the reference count for the input
pci_dev @from if it is not NULL.

If we break for_each_pci_dev() loop with pdev not NULL, we need to call
pci_dev_put() to decrease the reference count. Add the missing
pci_dev_put() after the 'out' label. Since pci_dev_put() can handle NULL
input parameter, there is no problem for the 'Device not found' branch.
For the normal path, add pci_dev_put() in amd_gpio_exit().

Fixes: f942a7de047d ("gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
MIPS: Remove repetitive increase irq_err_count 2022-07-02T14:17:14+00:00 huhai huhai@kylinos.cn 2022-06-10T11:14:20+00:00 0ee4ff6ae161c64a1bc1f8251f8e93b27e96a539 [ Upstream commit c81aba8fde2aee4f5778ebab3a1d51bd2ef48e4c ] commit 979934da9e7a ("[PATCH] mips: update IRQ handling for vr41xx") added a function irq_dispatch, and it'll increase irq_err_count when the get_irq callback returns a negative value, but increase irq_err_count in get_irq was not removed. And also, modpost complains once gpio-vr41xx drivers become modules. ERROR: modpost: "irq_err_count" [drivers/gpio/gpio-vr41xx.ko] undefined! So it would be a good idea to remove repetitive increase irq_err_count in get_irq callback. Fixes: 27fdd325dace ("MIPS: Update VR41xx GPIO driver to use gpiolib") Fixes: 979934da9e7a ("[PATCH] mips: update IRQ handling for vr41xx") Reported-by: k2ci <kernel-bot@kylinos.cn> Signed-off-by: huhai <huhai@kylinos.cn> Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit c81aba8fde2aee4f5778ebab3a1d51bd2ef48e4c ]

commit 979934da9e7a ("[PATCH] mips: update IRQ handling for vr41xx") added
a function irq_dispatch, and it'll increase irq_err_count when the get_irq
callback returns a negative value, but increase irq_err_count in get_irq
was not removed.

And also, modpost complains once gpio-vr41xx drivers become modules.
  ERROR: modpost: "irq_err_count" [drivers/gpio/gpio-vr41xx.ko] undefined!

So it would be a good idea to remove repetitive increase irq_err_count in
get_irq callback.

Fixes: 27fdd325dace ("MIPS: Update VR41xx GPIO driver to use gpiolib")
Fixes: 979934da9e7a ("[PATCH] mips: update IRQ handling for vr41xx")
Reported-by: k2ci <kernel-bot@kylinos.cn>
Signed-off-by: huhai <huhai@kylinos.cn>
Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpio: ts4900: Do not set DAT and OE together 2022-03-16T11:49:01+00:00 Mark Featherston mark@embeddedTS.com 2022-03-10T01:16:16+00:00 0c9a947a6818b3b0c52c49e40eceede597602e78 [ Upstream commit 03fe003547975680fdb9ff5ab0e41cb68276c4f2 ] This works around an issue with the hardware where both OE and DAT are exposed in the same register. If both are updated simultaneously, the harware makes no guarantees that OE or DAT will actually change in any given order and may result in a glitch of a few ns on a GPIO pin when changing direction and value in a single write. Setting direction to input now only affects OE bit. Setting direction to output updates DAT first, then OE. Fixes: 9c6686322d74 ("gpio: add Technologic I2C-FPGA gpio support") Signed-off-by: Mark Featherston <mark@embeddedTS.com> Signed-off-by: Kris Bahnsen <kris@embeddedTS.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 03fe003547975680fdb9ff5ab0e41cb68276c4f2 ]

This works around an issue with the hardware where both OE and
DAT are exposed in the same register. If both are updated
simultaneously, the harware makes no guarantees that OE or DAT
will actually change in any given order and may result in a
glitch of a few ns on a GPIO pin when changing direction and value
in a single write.

Setting direction to input now only affects OE bit. Setting
direction to output updates DAT first, then OE.

Fixes: 9c6686322d74 ("gpio: add Technologic I2C-FPGA gpio support")
Signed-off-by: Mark Featherston <mark@embeddedTS.com>
Signed-off-by: Kris Bahnsen <kris@embeddedTS.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpiolib: acpi: Do not set the IRQ type if the IRQ is already in use 2022-01-27T07:47:37+00:00 Hans de Goede hdegoede@redhat.com 2021-11-25T20:30:10+00:00 0e2705a3f9b7190fabc068bd3db687032c1a589c [ Upstream commit bdfd6ab8fdccd8b138837efff66f4a1911496378 ] If the IRQ is already in use, then acpi_dev_gpio_irq_get_by() really should not change the type underneath the current owner. I specifically hit an issue with this an a Chuwi Hi8 Super (CWI509) Bay Trail tablet, when the Boot OS selection in the BIOS is set to Android. In this case _STA for a MAX17047 ACPI I2C device wrongly returns 0xf and the _CRS resources for this device include a GpioInt pointing to a GPIO already in use by an _AEI handler, with a different type then specified in the _CRS for the MAX17047 device. Leading to the acpi_dev_gpio_irq_get() call done by the i2c-core-acpi.c code changing the type breaking the _AEI handler. Now this clearly is a bug in the DSDT of this tablet (in Android mode), but in general calling irq_set_irq_type() on an IRQ which already is in use seems like a bad idea. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit bdfd6ab8fdccd8b138837efff66f4a1911496378 ]

If the IRQ is already in use, then acpi_dev_gpio_irq_get_by() really
should not change the type underneath the current owner.

I specifically hit an issue with this an a Chuwi Hi8 Super (CWI509) Bay
Trail tablet, when the Boot OS selection in the BIOS is set to Android.
In this case _STA for a MAX17047 ACPI I2C device wrongly returns 0xf and
the _CRS resources for this device include a GpioInt pointing to a GPIO
already in use by an _AEI handler, with a different type then specified
in the _CRS for the MAX17047 device. Leading to the acpi_dev_gpio_irq_get()
call done by the i2c-core-acpi.c code changing the type breaking the
_AEI handler.

Now this clearly is a bug in the DSDT of this tablet (in Android mode),
but in general calling irq_set_irq_type() on an IRQ which already is
in use seems like a bad idea.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpio: zynq: Check return value of pm_runtime_get_sync 2021-07-20T14:21:12+00:00 Srinivas Neeli srinivas.neeli@xilinx.com 2021-04-09T14:08:05+00:00 88097381cb3bf28617751b8898857fbbe6eef074 [ Upstream commit a51b2fb94b04ab71e53a71b9fad03fa826941254 ] Return value of "pm_runtime_get_sync" API was neither captured nor checked. Fixed it by capturing the return value and then checking for any warning. Addresses-Coverity: "check_return" Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit a51b2fb94b04ab71e53a71b9fad03fa826941254 ]

Return value of "pm_runtime_get_sync" API was neither captured nor checked.
Fixed it by capturing the return value and then checking for any warning.

Addresses-Coverity: "check_return"
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpio: pcf857x: Fix missing first interrupt 2021-03-03T16:44:44+00:00 Maxim Kiselev bigunclemax@gmail.com 2021-02-17T13:10:00+00:00 828d937f52d82604dc430ed889b7dfb008c874ad commit a8002a35935aaefcd6a42ad3289f62bab947f2ca upstream. If no n_latch value will be provided at driver probe then all pins will be used as an input: gpio->out = ~n_latch; In that case initial state for all pins is "one": gpio->status = gpio->out; So if pcf857x IRQ happens with change pin value from "zero" to "one" then we miss it, because of "one" from IRQ and "one" from initial state leaves corresponding pin unchanged: change = (gpio->status ^ status) & gpio->irq_enabled; The right solution will be to read actual state at driver probe. Cc: stable@vger.kernel.org Fixes: 6e20a0a429bd ("gpio: pcf857x: enable gpio_to_irq() support") Signed-off-by: Maxim Kiselev <bigunclemax@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit a8002a35935aaefcd6a42ad3289f62bab947f2ca upstream.

If no n_latch value will be provided at driver probe then all pins will
be used as an input:

    gpio->out = ~n_latch;

In that case initial state for all pins is "one":

    gpio->status = gpio->out;

So if pcf857x IRQ happens with change pin value from "zero" to "one"
then we miss it, because of "one" from IRQ and "one" from initial state
leaves corresponding pin unchanged:
change = (gpio->status ^ status) & gpio->irq_enabled;

The right solution will be to read actual state at driver probe.

Cc: stable@vger.kernel.org
Fixes: 6e20a0a429bd ("gpio: pcf857x: enable gpio_to_irq() support")
Signed-off-by: Maxim Kiselev <bigunclemax@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
gpio: tc35894: fix up tc35894 interrupt configuration 2020-10-14T07:48:12+00:00 dillon min dillon.minfei@gmail.com 2020-09-03T07:30:21+00:00 eaff5190972173f9813f820d77419df9eeb6ead4 commit 214b0e1ad01abf4c1f6d8d28fa096bf167e47cef upstream. The offset of regmap is incorrect, j * 8 is move to the wrong register. for example: asume i = 0, j = 1. we want to set KPY5 as interrupt falling edge mode, regmap[0][1] should be TC3589x_GPIOIBE1 0xcd but, regmap[i] + j * 8 = TC3589x_GPIOIBE0 + 8 ,point to 0xd4, this is TC3589x_GPIOIE2 not TC3589x_GPIOIBE1. Fixes: d88b25be3584 ("gpio: Add TC35892 GPIO driver") Cc: Cc: stable@vger.kernel.org Signed-off-by: dillon min <dillon.minfei@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 214b0e1ad01abf4c1f6d8d28fa096bf167e47cef upstream.

The offset of regmap is incorrect, j * 8 is move to the
wrong register.

for example:

asume i = 0, j = 1. we want to set KPY5 as interrupt
falling edge mode, regmap[0][1] should be TC3589x_GPIOIBE1 0xcd
but, regmap[i] + j * 8 = TC3589x_GPIOIBE0 + 8 ,point to 0xd4,
this is TC3589x_GPIOIE2 not TC3589x_GPIOIBE1.

Fixes: d88b25be3584 ("gpio: Add TC35892 GPIO driver")
Cc: Cc: stable@vger.kernel.org
Signed-off-by: dillon min <dillon.minfei@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
gpio: fix oops resulting from calling of_get_named_gpio(NULL, ...) 2020-08-21T09:01:56+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2020-08-14T07:47:11+00:00 e52c5a9ff960feb4983c5c3e3ff6659bc3e86388 This happens for the spi-imx driver when running a dt-enabled kernel on a non-dt machine on Linux 4.0. Among the still supported stable versions only 4.4 and 4.9 are affected. (However the spi-imx driver doesn't call of_get_named_gpio() since v4.8-rc1 (commit b36581df7e78 ("spi: imx: Using existing properties for chipselects")) any more, but the problem might still affect other users of of_get_named_gpio().) In 4.14-rc1 this problem is gone with commit 7eb6ce2f2723 ("gpio: Convert to using %pOF instead of full_name"). This commit however doesn't seem sensible to backport as it depends on ce4fecf1fe15 ("vsprintf: Add %p extension "%pOF" for device tree") which doesn't trivially apply to v4.4. [ 1.649453] Unable to handle kernel NULL pointer dereference at virtual address 0000000c [ 1.659270] pgd = c0004000 [ 1.662036] [0000000c] *pgd=00000000 [ 1.665919] Internal error: Oops - BUG: 5 [#1] PREEMPT ARM [ 1.671438] Modules linked in: [ 1.674552] CPU: 0 PID: 1 Comm: swapper Not tainted 4.0.0 #1 [ 1.680235] Hardware name: Eckelmann ECU01 [ 1.684361] task: c7840000 ti: c7842000 task.ti: c7842000 [ 1.689821] PC is at of_get_named_gpiod_flags+0xac/0xe0 [ 1.695104] LR is at of_find_property+0x38/0x7c [ 1.699674] pc : [<c025db2c>] lr : [<c03c5f54>] psr: a0000013 [ 1.699674] sp : c7843cc8 ip : c7843c38 fp : c7843d3c [ 1.711183] r10: c7884dc0 r9 : c7a8de10 r8 : 00000000 [ 1.716434] r7 : 00000000 r6 : 00000000 r5 : c065ef50 r4 : fffffffe [ 1.722986] r3 : 00000000 r2 : 00000000 r1 : c065ef50 r0 : fffffffe [ 1.729541] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 1.736879] Control: 0005317f Table: 80004000 DAC: 00000017 [ 1.742652] Process swapper (pid: 1, stack limit = 0xc7842190) [ 1.748510] Stack: (0xc7843cc8 to 0xc7844000) [ 1.752906] 3cc0: c7843cd4 c003ccec 00000000 00000000 00000000 00000000 [ 1.761125] 3ce0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.769345] 3d00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 fffffdfb [ 1.777566] 3d20: 00000000 c78b4e10 c7a8dc00 000001ff c7843d4c c7843d40 c025db70 c025da90 [ 1.785788] 3d40: c7843dcc c7843d50 c02f8938 c025db70 c7843d74 c7843d60 c79bc3c0 c79bc320 [ 1.794007] 3d60: c78bb140 c065476c c7a8de10 00000000 c78b4e10 c78b4e00 00000004 00000001 [ 1.802227] 3d80: c06d25d4 00000000 c7843dbc c7843d98 c0115a68 c0112538 00000001 c78b4e10 [ 1.810448] 3da0: c78b4e18 ffffffed c78b4e10 fffffdfb c070bc80 00000000 c06d25d4 00000000 [ 1.818669] 3dc0: c7843dec c7843dd0 c02a0670 c02f8828 c78b4e10 c073fcb0 00000000 c070bc80 [ 1.826890] 3de0: c7843e14 c7843df0 c029f064 c02a0630 00000000 c78b4e10 c070bc80 c78b4e44 [ 1.835110] 3e00: 00000000 c06c8cac c7843e34 c7843e18 c029f204 c029ef70 c029f170 00000000 [ 1.843332] 3e20: c070bc80 c029f170 c7843e5c c7843e38 c029d6f4 c029f180 c785c1cc c7873c30 [ 1.851553] 3e40: c0235728 c070bc80 c7ab9720 c0701e20 c7843e6c c7843e60 c029eb74 c029d6a4 [ 1.859774] 3e60: c7843e94 c7843e70 c029e7f4 c029eb64 c065f390 c7843e80 c070bc80 c06f0718 [ 1.867998] 3e80: c7ab8d60 c06b1528 c7843eac c7843e98 c029f810 c029e728 c06f0718 c06f0718 [ 1.876220] 3ea0: c7843ebc c7843eb0 c02a04dc c029f7ac c7843ecc c7843ec0 c06c8cc4 c02a049c [ 1.884443] 3ec0: c7843f4c c7843ed0 c00089dc c06c8cbc c0109ec0 c0109d18 c780ac00 00000001 [ 1.892665] 3ee0: c7843f00 c7843ef0 c06b1544 c0238a24 c7ffca48 c054c854 c7843f4c c7843f08 [ 1.900886] 3f00: c002e7f4 c06b1538 c003d0e0 00000006 00000006 c06af1a4 00000000 c066ccb4 [ 1.909107] 3f20: c7843f4c c06ea994 00000006 c071ff20 c06b1528 c06d25e0 c06d25d4 0000008f [ 1.917327] 3f40: c7843f94 c7843f50 c06b1e6c c0008964 00000006 00000006 c06b1528 dfe48a08 [ 1.925547] 3f60: 33f73660 3fd760c5 0b5d4bfd 00000000 c0527ef0 00000000 00000000 00000000 [ 1.933768] 3f80: 00000000 00000000 c7843fac c7843f98 c0527f00 c06b1d00 c7842000 00000000 [ 1.941988] 3fa0: 00000000 c7843fb0 c0009798 c0527f00 00000000 00000000 00000000 00000000 [ 1.950206] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.958424] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 b3cf731f fe6afeef [ 1.966617] Backtrace: [ 1.969150] [<c025da80>] (of_get_named_gpiod_flags) from [<c025db70>] (of_get_named_gpio_flags+0x10/0x24) [ 1.978744] r7:000001ff r6:c7a8dc00 r5:c78b4e10 r4:00000000 [ 1.984548] [<c025db60>] (of_get_named_gpio_flags) from [<c02f8938>] (spi_imx_probe+0x120/0x67c) [ 1.993390] [<c02f8818>] (spi_imx_probe) from [<c02a0670>] (platform_drv_probe+0x50/0xac) [ 2.001589] r10:00000000 r9:c06d25d4 r8:00000000 r7:c070bc80 r6:fffffdfb r5:c78b4e10 [ 2.009549] r4:ffffffed [ 2.012144] [<c02a0620>] (platform_drv_probe) from [<c029f064>] (driver_probe_device+0x104/0x210) [ 2.021040] r7:c070bc80 r6:00000000 r5:c073fcb0 r4:c78b4e10 [ 2.026822] [<c029ef60>] (driver_probe_device) from [<c029f204>] (__driver_attach+0x94/0x98) [ 2.035282] r8:c06c8cac r7:00000000 r6:c78b4e44 r5:c070bc80 r4:c78b4e10 r3:00000000 [ 2.043191] [<c029f170>] (__driver_attach) from [<c029d6f4>] (bus_for_each_dev+0x60/0x90) [ 2.051394] r6:c029f170 r5:c070bc80 r4:00000000 r3:c029f170 [ 2.057185] [<c029d694>] (bus_for_each_dev) from [<c029eb74>] (driver_attach+0x20/0x28) [ 2.065212] r6:c0701e20 r5:c7ab9720 r4:c070bc80 [ 2.069931] [<c029eb54>] (driver_attach) from [<c029e7f4>] (bus_add_driver+0xdc/0x1dc) [ 2.077894] [<c029e718>] (bus_add_driver) from [<c029f810>] (driver_register+0x74/0xec) [ 2.085919] r7:c06b1528 r6:c7ab8d60 r5:c06f0718 r4:c070bc80 [ 2.091705] [<c029f79c>] (driver_register) from [<c02a04dc>] (__platform_driver_register+0x50/0x64) [ 2.100774] r5:c06f0718 r4:c06f0718 [ 2.104437] [<c02a048c>] (__platform_driver_register) from [<c06c8cc4>] (spi_imx_driver_init+0x18/0x20) [ 2.113884] [<c06c8cac>] (spi_imx_driver_init) from [<c00089dc>] (do_one_initcall+0x88/0x1b0) [ 2.122459] [<c0008954>] (do_one_initcall) from [<c06b1e6c>] (kernel_init_freeable+0x17c/0x248) [ 2.131182] r10:0000008f r9:c06d25d4 r8:c06d25e0 r7:c06b1528 r6:c071ff20 r5:00000006 [ 2.139141] r4:c06ea994 [ 2.141751] [<c06b1cf0>] (kernel_init_freeable) from [<c0527f00>] (kernel_init+0x10/0xec) [ 2.149955] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0527ef0 [ 2.157909] r4:00000000 [ 2.160508] [<c0527ef0>] (kernel_init) from [<c0009798>] (ret_from_fork+0x14/0x3c) [ 2.168099] r4:00000000 r3:c7842000 [ 2.171755] Code: eb0b2dc2 e51b0020 e24bd01c e89da8f0 (e597300c) Cc: stable@vger.kernel.org # v4.4.x, v4.9.x Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sasha Levin <sashal@kernel.org> 
This happens for the spi-imx driver when running a dt-enabled kernel on
a non-dt machine on Linux 4.0. Among the still supported stable versions
only 4.4 and 4.9 are affected. (However the spi-imx driver doesn't call
of_get_named_gpio() since v4.8-rc1 (commit b36581df7e78 ("spi: imx:
Using existing properties for chipselects")) any more, but the problem
might still affect other users of of_get_named_gpio().)

In 4.14-rc1 this problem is gone with
commit 7eb6ce2f2723 ("gpio: Convert to using %pOF instead of
full_name"). This commit however doesn't seem sensible to backport as it
depends on ce4fecf1fe15 ("vsprintf: Add %p extension "%pOF" for device
tree") which doesn't trivially apply to v4.4.

[    1.649453] Unable to handle kernel NULL pointer dereference at virtual address 0000000c
[    1.659270] pgd = c0004000
[    1.662036] [0000000c] *pgd=00000000
[    1.665919] Internal error: Oops - BUG: 5 [#1] PREEMPT ARM
[    1.671438] Modules linked in:
[    1.674552] CPU: 0 PID: 1 Comm: swapper Not tainted 4.0.0 #1
[    1.680235] Hardware name: Eckelmann ECU01
[    1.684361] task: c7840000 ti: c7842000 task.ti: c7842000
[    1.689821] PC is at of_get_named_gpiod_flags+0xac/0xe0
[    1.695104] LR is at of_find_property+0x38/0x7c
[    1.699674] pc : [<c025db2c>]    lr : [<c03c5f54>]    psr: a0000013
[    1.699674] sp : c7843cc8  ip : c7843c38  fp : c7843d3c
[    1.711183] r10: c7884dc0  r9 : c7a8de10  r8 : 00000000
[    1.716434] r7 : 00000000  r6 : 00000000  r5 : c065ef50  r4 : fffffffe
[    1.722986] r3 : 00000000  r2 : 00000000  r1 : c065ef50  r0 : fffffffe
[    1.729541] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
[    1.736879] Control: 0005317f  Table: 80004000  DAC: 00000017
[    1.742652] Process swapper (pid: 1, stack limit = 0xc7842190)
[    1.748510] Stack: (0xc7843cc8 to 0xc7844000)
[    1.752906] 3cc0:                   c7843cd4 c003ccec 00000000 00000000 00000000 00000000
[    1.761125] 3ce0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    1.769345] 3d00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 fffffdfb
[    1.777566] 3d20: 00000000 c78b4e10 c7a8dc00 000001ff c7843d4c c7843d40 c025db70 c025da90
[    1.785788] 3d40: c7843dcc c7843d50 c02f8938 c025db70 c7843d74 c7843d60 c79bc3c0 c79bc320
[    1.794007] 3d60: c78bb140 c065476c c7a8de10 00000000 c78b4e10 c78b4e00 00000004 00000001
[    1.802227] 3d80: c06d25d4 00000000 c7843dbc c7843d98 c0115a68 c0112538 00000001 c78b4e10
[    1.810448] 3da0: c78b4e18 ffffffed c78b4e10 fffffdfb c070bc80 00000000 c06d25d4 00000000
[    1.818669] 3dc0: c7843dec c7843dd0 c02a0670 c02f8828 c78b4e10 c073fcb0 00000000 c070bc80
[    1.826890] 3de0: c7843e14 c7843df0 c029f064 c02a0630 00000000 c78b4e10 c070bc80 c78b4e44
[    1.835110] 3e00: 00000000 c06c8cac c7843e34 c7843e18 c029f204 c029ef70 c029f170 00000000
[    1.843332] 3e20: c070bc80 c029f170 c7843e5c c7843e38 c029d6f4 c029f180 c785c1cc c7873c30
[    1.851553] 3e40: c0235728 c070bc80 c7ab9720 c0701e20 c7843e6c c7843e60 c029eb74 c029d6a4
[    1.859774] 3e60: c7843e94 c7843e70 c029e7f4 c029eb64 c065f390 c7843e80 c070bc80 c06f0718
[    1.867998] 3e80: c7ab8d60 c06b1528 c7843eac c7843e98 c029f810 c029e728 c06f0718 c06f0718
[    1.876220] 3ea0: c7843ebc c7843eb0 c02a04dc c029f7ac c7843ecc c7843ec0 c06c8cc4 c02a049c
[    1.884443] 3ec0: c7843f4c c7843ed0 c00089dc c06c8cbc c0109ec0 c0109d18 c780ac00 00000001
[    1.892665] 3ee0: c7843f00 c7843ef0 c06b1544 c0238a24 c7ffca48 c054c854 c7843f4c c7843f08
[    1.900886] 3f00: c002e7f4 c06b1538 c003d0e0 00000006 00000006 c06af1a4 00000000 c066ccb4
[    1.909107] 3f20: c7843f4c c06ea994 00000006 c071ff20 c06b1528 c06d25e0 c06d25d4 0000008f
[    1.917327] 3f40: c7843f94 c7843f50 c06b1e6c c0008964 00000006 00000006 c06b1528 dfe48a08
[    1.925547] 3f60: 33f73660 3fd760c5 0b5d4bfd 00000000 c0527ef0 00000000 00000000 00000000
[    1.933768] 3f80: 00000000 00000000 c7843fac c7843f98 c0527f00 c06b1d00 c7842000 00000000
[    1.941988] 3fa0: 00000000 c7843fb0 c0009798 c0527f00 00000000 00000000 00000000 00000000
[    1.950206] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    1.958424] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 b3cf731f fe6afeef
[    1.966617] Backtrace:
[    1.969150] [<c025da80>] (of_get_named_gpiod_flags) from [<c025db70>] (of_get_named_gpio_flags+0x10/0x24)
[    1.978744]  r7:000001ff r6:c7a8dc00 r5:c78b4e10 r4:00000000
[    1.984548] [<c025db60>] (of_get_named_gpio_flags) from [<c02f8938>] (spi_imx_probe+0x120/0x67c)
[    1.993390] [<c02f8818>] (spi_imx_probe) from [<c02a0670>] (platform_drv_probe+0x50/0xac)
[    2.001589]  r10:00000000 r9:c06d25d4 r8:00000000 r7:c070bc80 r6:fffffdfb r5:c78b4e10
[    2.009549]  r4:ffffffed
[    2.012144] [<c02a0620>] (platform_drv_probe) from [<c029f064>] (driver_probe_device+0x104/0x210)
[    2.021040]  r7:c070bc80 r6:00000000 r5:c073fcb0 r4:c78b4e10
[    2.026822] [<c029ef60>] (driver_probe_device) from [<c029f204>] (__driver_attach+0x94/0x98)
[    2.035282]  r8:c06c8cac r7:00000000 r6:c78b4e44 r5:c070bc80 r4:c78b4e10 r3:00000000
[    2.043191] [<c029f170>] (__driver_attach) from [<c029d6f4>] (bus_for_each_dev+0x60/0x90)
[    2.051394]  r6:c029f170 r5:c070bc80 r4:00000000 r3:c029f170
[    2.057185] [<c029d694>] (bus_for_each_dev) from [<c029eb74>] (driver_attach+0x20/0x28)
[    2.065212]  r6:c0701e20 r5:c7ab9720 r4:c070bc80
[    2.069931] [<c029eb54>] (driver_attach) from [<c029e7f4>] (bus_add_driver+0xdc/0x1dc)
[    2.077894] [<c029e718>] (bus_add_driver) from [<c029f810>] (driver_register+0x74/0xec)
[    2.085919]  r7:c06b1528 r6:c7ab8d60 r5:c06f0718 r4:c070bc80
[    2.091705] [<c029f79c>] (driver_register) from [<c02a04dc>] (__platform_driver_register+0x50/0x64)
[    2.100774]  r5:c06f0718 r4:c06f0718
[    2.104437] [<c02a048c>] (__platform_driver_register) from [<c06c8cc4>] (spi_imx_driver_init+0x18/0x20)
[    2.113884] [<c06c8cac>] (spi_imx_driver_init) from [<c00089dc>] (do_one_initcall+0x88/0x1b0)
[    2.122459] [<c0008954>] (do_one_initcall) from [<c06b1e6c>] (kernel_init_freeable+0x17c/0x248)
[    2.131182]  r10:0000008f r9:c06d25d4 r8:c06d25e0 r7:c06b1528 r6:c071ff20 r5:00000006
[    2.139141]  r4:c06ea994
[    2.141751] [<c06b1cf0>] (kernel_init_freeable) from [<c0527f00>] (kernel_init+0x10/0xec)
[    2.149955]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0527ef0
[    2.157909]  r4:00000000
[    2.160508] [<c0527ef0>] (kernel_init) from [<c0009798>] (ret_from_fork+0x14/0x3c)
[    2.168099]  r4:00000000 r3:c7842000
[    2.171755] Code: eb0b2dc2 e51b0020 e24bd01c e89da8f0 (e597300c)

Cc: stable@vger.kernel.org # v4.4.x, v4.9.x
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpio: tegra: mask GPIO IRQs during IRQ shutdown 2020-06-03T06:16:34+00:00 Stephen Warren swarren@nvidia.com 2020-04-27T23:26:05+00:00 35a237b7ebbc700b07d0110d89adc847e762db8d [ Upstream commit 0cf253eed5d2bdf7bb3152457b38f39b012955f7 ] The driver currently leaves GPIO IRQs unmasked even when the GPIO IRQ client has released the GPIO IRQ. This allows the HW to raise IRQs, and SW to process them, after shutdown. Fix this by masking the IRQ when it's shut down. This is usually taken care of by the irqchip core, but since this driver has a custom irq_shutdown implementation, it must do this explicitly itself. Signed-off-by: Stephen Warren <swarren@nvidia.com> Link: https://lore.kernel.org/r/20200427232605.11608-1-swarren@wwwdotorg.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 0cf253eed5d2bdf7bb3152457b38f39b012955f7 ]

The driver currently leaves GPIO IRQs unmasked even when the GPIO IRQ
client has released the GPIO IRQ. This allows the HW to raise IRQs, and
SW to process them, after shutdown. Fix this by masking the IRQ when it's
shut down. This is usually taken care of by the irqchip core, but since
this driver has a custom irq_shutdown implementation, it must do this
explicitly itself.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Link: https://lore.kernel.org/r/20200427232605.11608-1-swarren@wwwdotorg.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Revert "gpio: set up initial state from .get_direction()" 2020-04-24T05:59:08+00:00 Timur Tabi timur@codeaurora.org 2020-04-21T12:39:56+00:00 1704eb50f37828697a376542e83bb400ccc3f3a9 [ Upstream commit 1ca2a92b2a99323f666f1b669b7484df4bda05e4 ] This reverts commit 72d3200061776264941be1b5a9bb8e926b3b30a5. We cannot blindly query the direction of all GPIOs when the pins are first registered. The get_direction callback normally triggers a read/write to hardware, but we shouldn't be touching the hardware for an individual GPIO until after it's been properly claimed. Signed-off-by: Timur Tabi <timur@codeaurora.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit 1ca2a92b2a99323f666f1b669b7484df4bda05e4 ]

This reverts commit 72d3200061776264941be1b5a9bb8e926b3b30a5.

We cannot blindly query the direction of all GPIOs when the pins are
first registered.  The get_direction callback normally triggers a
read/write to hardware, but we shouldn't be touching the hardware for
an individual GPIO until after it's been properly claimed.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>