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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-04-11 16:33:42 +0800 |
|---|---|---|
| committer | Archit Taneja <architt@codeaurora.org> | 2018-05-04 11:30:51 +0530 |
| commit | 5f27314141757794378abb2907fb7116947d644b (patch) | |
| tree | 0da12905fd75f9d47119520c545d40c00758d4f7 /drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | |
| parent | 7bd2d2ecedff26b3a87b026b98acc4b7110c9ee6 (diff) | |
| download | linux-5f27314141757794378abb2907fb7116947d644b.tar.gz linux-5f27314141757794378abb2907fb7116947d644b.tar.bz2 linux-5f27314141757794378abb2907fb7116947d644b.zip | |
gpu: drm: bridge: adv7511: Replace mdelay with usleep_range in adv7511_probe
adv7511_probe() is never called in atomic context.
This function is only set as ".probe" in struct i2c_driver.
Despite never getting called from atomic context, adv7511_probe()
calls mdelay() to busily wait.
This is not necessary and can be replaced with usleep_range() to
avoid busy waiting.
This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1523435622-4329-1-git-send-email-baijiaju1990@gmail.com
Diffstat (limited to 'drivers/gpu/drm/bridge/adv7511/adv7511_drv.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 2614cea538e2..73021b388e12 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -1127,7 +1127,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) } if (adv7511->gpio_pd) { - mdelay(5); + usleep_range(5000, 6000); gpiod_set_value_cansleep(adv7511->gpio_pd, 0); } |