irda_usb_probe() is never called in atomic context.
irda_usb_probe() is only set as ".probe" in struct usb_driver.
Despite never getting called from atomic context, irda_usb_probe()
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(-)
diff --git a/drivers/staging/irda/drivers/irda-usb.c b/drivers/staging/irda/drivers/irda-usb.c
index 723e49b..6ff5b08 100644
--- a/drivers/staging/irda/drivers/irda-usb.c
+++ b/drivers/staging/irda/drivers/irda-usb.c
@@ -1710,7 +1710,7 @@ static int irda_usb_probe(struct usb_interface *intf,
pr_debug("usb_control_msg failed %d\n", ret);
goto err_out_3;
} else {
- mdelay(10);
+ usleep_range(10000, 11000);
}
}
--
1.9.1
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
