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(parent: 8346b92) | patch
gpio: zynq: protect direction in/out with a spinlock
authorGlenn Langedock <Glenn.Langedock@barco.com>
Wed, 17 Jun 2020 11:37:21 +0000 (17:07 +0530)
committerBartosz Golaszewski <bgolaszewski@baylibre.com>
Wed, 24 Jun 2020 10:10:09 +0000 (12:10 +0200)
commitfdcfec11b215b3bbc9c20240739cf76be921cca1
treed2e637aeb3226c1d82fbaf276b2507b24a86a493tree | snapshot
parent8346b92ecddfae624b1dd4631e840fb98f5430cdcommit | diff
gpio: zynq: protect direction in/out with a spinlock

Fix race condition when changing the direction (in/out) of the GPIO pin.
The read-modify-write sequence (as coded in the driver) isn't atomic and
requires synchronization (spinlock).

Signed-off-by: Glenn Langedock <Glenn.Langedock@barco.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
drivers/gpio/gpio-zynq.c diff | blob | history
Domain: System / Kernel;