alistair23-linux/drivers/video/fbdev/savage
Jia-Ju Bai 12f3ac2fb1 video: fbdev: savage: Replace mdelay with usleep_range in savage_init_hw
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>
Cc: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2018-04-24 18:11:21 +02:00
..
Makefile
savagefb-i2c.c
savagefb.h
savagefb_accel.c
savagefb_driver.c video: fbdev: savage: Replace mdelay with usleep_range in savage_init_hw 2018-04-24 18:11:21 +02:00