Messages in this thread | | | From | Bartlomiej Zolnierkiewicz <> | Subject | Re: [PATCH] video: fbdev: savage: Replace mdelay with usleep_range in savage_init_hw | Date | Tue, 24 Apr 2018 17:42:51 +0200 |
| |
On Tuesday, April 10, 2018 09:05:59 AM Jia-Ju Bai wrote: > savage_init_hw() is never called in atomic context. > > The call chains ending up at savage_init_hw() are: > [1] savage_init_hw() <- savagefb_probe() > [2] savage_init_hw() <- savagefb_resume() > > savagefb_probe() is only set as ".probe" in struct pci_driver. > savagefb_resume) is only set as ".resume" in struct pci_driver. > These functions are not called in atomic context. > > Despite never getting called from atomic context, savage_init_hw() > 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>
Patch queued for 4.18, thanks.
Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics
| |