linux-kernel - [PATCH] media: pci: cx23885: Replace mdelay() with msleep() and usleep_range() in altera_ci_slot

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Message-Id: <20180727030946.2886-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 11:09:46 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] media: pci: cx23885: Replace mdelay() with msleep() and usleep_range() in altera_ci_slot_reset()

altera_ci_slot_reset() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().

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

Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/media/pci/cx23885/altera-ci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/cx23885/altera-ci.c b/drivers/media/pci/cx23885/altera-ci.c
index 70aec9bb7e95..62bc8049b320 100644
--- a/drivers/media/pci/cx23885/altera-ci.c
+++ b/drivers/media/pci/cx23885/altera-ci.c
@@ -346,7 +346,7 @@ static int altera_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
 	mutex_unlock(&inter->fpga_mutex);
 
 	for (;;) {
-		mdelay(50);
+		msleep(50);
 
 		mutex_lock(&inter->fpga_mutex);
 
-- 
2.17.0