Re: [PATCH 1/2] staging: irda: Replace mdelay with usleep_range in stir421x_fw_upload

[Jia-Ju Bai]

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@xxxxxxxxx>
> > > > ---
> > > >    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