wbsd_pnp_resume() is never called in atomic context.
This function is only set as ".resume" in struct pnp_driver.

Despite never getting called from atomic context, wbsd_pnp_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 <baijiaju1...@gmail.com>
 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..83e13cf 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -1890,7 +1890,7 @@ static int wbsd_pnp_resume(struct pnp_dev *pnp_dev)
         * Allow device to initialise itself properly.
-       mdelay(5);
+       usleep_range(5000, 6000);
        return 0;

Reply via email to