evie/android_kernel_oneplus_msm8998
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gpio: No NULL owner

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Sometimes a GPIO is fetched with NULL as parent device, and
that is just fine. So under these circumstances, avoid using
dev_name() to provide a name for the GPIO line.

Change-Id: Iacf2ef35d50118cd755e26ed4211c3c4b1289ff2
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Git-commit: 7d18f0a14aa6a0d6bad39111c1fb655f07f71d59
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
This commit is contained in:
Linus Walleij 2018-01-16 08:42:12 +01:00 • committed by Gerrit - the friendly Code Review server
parent cb0e8e7c96
commit e29ce8dc74
1 changed files with 7 additions and 2 deletions
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9
drivers/gpio/gpiolib.c
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@ -2117,6 +2117,8 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
struct gpio_desc *desc = NULL; struct gpio_desc *desc = NULL;
int status; int status;
enum gpio_lookup_flags lookupflags = 0; enum gpio_lookup_flags lookupflags = 0;
/* Maybe we have a device name, maybe not */
const char *devname = dev ? dev_name(dev) : "?";
dev_dbg(dev, "GPIO lookup for consumer %s\n", con_id); dev_dbg(dev, "GPIO lookup for consumer %s\n", con_id);
@ -2145,8 +2147,11 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
return desc; return desc;
} }
/* If a connection label was passed use that, else use the device name as label */ /*
status = gpiod_request(desc, con_id ? con_id : dev_name(dev)); * If a connection label was passed use that, else attempt to use
* the device name as label
*/
status = gpiod_request(desc, con_id ? con_id : devname);
if (status < 0) if (status < 0)
return ERR_PTR(status); return ERR_PTR(status);