[PATCH] block: paride: on26: Replace mdelay with msleep in on26_test_port

From: Jia-Ju Bai
Date: Fri Jan 26 2018 - 10:37:55 EST


After checking all possible call chains to on26_test_port() here,
my tool finds that this function is never called in atomic context,
namely never in an interrupt handler or holding a spinlock.
And on26_test_port() is only called by pi_probe_unit() that calls
wait_event() through pi_claim(),
so it indicates that on26_test_port() can call functions that can sleep.
Thus mdelay can be replaced with msleep to avoid busy wait.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxxxx>
---
drivers/block/paride/on26.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/paride/on26.c b/drivers/block/paride/on26.c
index 95ba256..3240d6f 100644
--- a/drivers/block/paride/on26.c
+++ b/drivers/block/paride/on26.c
@@ -163,7 +163,7 @@ static int on26_test_port( PIA *pi) /* hard reset */
on26_write_regr(pi,0,6,0xb0);
y = on26_read_regr(pi,0,7);
if (!((x&0x80)||(y&0x80))) break;
- mdelay(100);
+ msleep(100);
}

if (i == RESET_WAIT)
--
1.7.9.5