Messages in this thread | | | Subject | Re: [PATCH 1/2] staging: irda: Replace mdelay with usleep_range in stir421x_fw_upload | From | Jia-Ju Bai <> | Date | Wed, 11 Apr 2018 16:11:00 +0800 |
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On 2018/4/11 16:03, Greg KH wrote: > On Wed, Apr 11, 2018 at 03:17:10PM +0800, Jia-Ju Bai wrote: >> >> On 2018/4/11 14:41, Greg KH wrote: >>> On Wed, Apr 11, 2018 at 09:29:34AM +0800, Jia-Ju Bai wrote: >>>> stir421x_fw_upload() is never called in atomic context. >>>> >>>> The call chain ending up at stir421x_fw_upload() is: >>>> [1] stir421x_fw_upload() <- stir421x_patch_device() <- irda_usb_probe() >>>> >>>> irda_usb_probe() is set as ".probe" in struct usb_driver. >>>> This function is not called in atomic context. >>>> >>>> Despite never getting called from atomic context, stir421x_fw_upload() >>>> 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> >>>> --- >>>> drivers/staging/irda/drivers/irda-usb.c | 2 +- >>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> Please, at the very least, work off of Linus's tree. There is no >>> drivers/staging/irda/ anymore :) >>> >> Okay, sorry. >> Could you please recommend me a right tree or its git address? > Have you looked in the MAINTAINERS file? Worst case, always use > linux-next. > > greg k-h
Oh, sorry, I did notice the git tree in the MAINTAINERS file. I always used linux-stable. Thanks for telling me this :)
Best wishes, Jia-Ju Bai
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