wbsd_platform_resume() is never called in atomic context.
This function is only set as ".resume" in struct platform_driver.
Despite never getting called from atomic context, wbsd_platform_resume()
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 <[email protected]>
---
drivers/mmc/host/wbsd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index 546aaf8..17d36c1 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -1846,7 +1846,7 @@ static int wbsd_platform_resume(struct platform_device *dev)
/*
* Allow device to initialise itself properly.
*/
- mdelay(5);
+ usleep_range(5000, 6000);
wbsd_init_device(host);
return 0;
--
1.9.1