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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2025-02-13 17:56:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 13:57:09 +0100 |
| commit | 4d9b2b62e1136d10f661ec4c0c268140b6f74f4f (patch) | |
| tree | b50020c3f3641c963f8062040b3a3939f5d0cf07 /drivers | |
| parent | 99ca540851ee906ae15d36566ed3447e6e415780 (diff) | |
| download | linux-4d9b2b62e1136d10f661ec4c0c268140b6f74f4f.tar.gz linux-4d9b2b62e1136d10f661ec4c0c268140b6f74f4f.tar.bz2 linux-4d9b2b62e1136d10f661ec4c0c268140b6f74f4f.zip | |
gpiolib: Fix crash on error in gpiochip_get_ngpios()
[ Upstream commit 7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44 ]
The gpiochip_get_ngpios() uses chip_*() macros to print messages.
However these macros rely on gpiodev to be initialised and set,
which is not the case when called via bgpio_init(). In such a case
the printing messages will crash on NULL pointer dereference.
Replace chip_*() macros by the respective dev_*() ones to avoid
such crash.
Fixes: 55b2395e4e92 ("gpio: mmio: handle "ngpios" properly in bgpio_init()")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250213155646.2882324-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 5c0016c77d2a..efb592b6f6aa 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -723,13 +723,13 @@ int gpiochip_get_ngpios(struct gpio_chip *gc, struct device *dev) } if (gc->ngpio == 0) { - chip_err(gc, "tried to insert a GPIO chip with zero lines\n"); + dev_err(dev, "tried to insert a GPIO chip with zero lines\n"); return -EINVAL; } if (gc->ngpio > FASTPATH_NGPIO) - chip_warn(gc, "line cnt %u is greater than fast path cnt %u\n", - gc->ngpio, FASTPATH_NGPIO); + dev_warn(dev, "line cnt %u is greater than fast path cnt %u\n", + gc->ngpio, FASTPATH_NGPIO); return 0; } |