Messages in this thread | | | Subject | Re: [PATCH] gpu: drm: bridge: adv7511: Replace mdelay with usleep_range in adv7511_probe | From | Archit Taneja <> | Date | Fri, 4 May 2018 11:38:46 +0530 |
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On Friday 27 April 2018 03:46 AM, Laurent Pinchart wrote: > Hi Jia-Ju, > > Thank you for the patch. > > On Wednesday, 11 April 2018 11:33:42 EEST Jia-Ju Bai wrote: >> 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. > > Nice work ! Is the tool open-source ? > >> Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> >> --- >> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c >> b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index b2431ae..2cf7fa1 >> 100644 >> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c >> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c >> @@ -1054,7 +1054,7 @@ 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); >> } > > The patch looks good to me. > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
queued to drm-misc-next
Thanks, Archit
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