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| author | Axel Lin <axel.lin@ingics.com> | 2013-08-19 10:07:46 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-08-28 13:13:05 +0200 |
| commit | 9b77ace409e1419c331209c4c8eb2c8bc990e9fd (patch) | |
| tree | 0bb3a43aee693c3fe68924a2dfc07254ef3f69b3 /drivers/pinctrl/Kconfig | |
| parent | 406044695fb286110324491f26f3e05048488809 (diff) | |
| download | blackbird-op-linux-9b77ace409e1419c331209c4c8eb2c8bc990e9fd.tar.gz blackbird-op-linux-9b77ace409e1419c331209c4c8eb2c8bc990e9fd.zip | |
pinctrl: core: Add proper mutex lock in pinctrl_request_gpio
This one is missed in commit 42fed7ba "pinctrl: move subsystem mutex to
pinctrl_dev struct".
I think this fixes the race between pin_free() and pin_request() calls.
It protects accessing the members of pctldev->desc.
(e.g. update desc->mux_usecount, desc->gpio_owner, desc->mux_owner, etc)
Current code grabs pctldev->mutex before calling pinmux_free_gpio(),
but did not grab the mutex while calling pinmux_request_gpio().
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/Kconfig')
0 files changed, 0 insertions, 0 deletions
