All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: stefanr@s5r6.in-berlin.de
Cc: linux1394-devel@lists.sourceforge.net,
	linux-kernel@vger.kernel.org, Jia-Ju Bai <baijiaju1990@gmail.com>
Subject: [PATCH] firewire: init_ohci1394_dma: Replace mdelay with msleep
Date: Mon, 23 Jul 2018 22:21:04 +0800	[thread overview]
Message-ID: <20180723142104.3477-1-baijiaju1990@gmail.com> (raw)

init_ohci1394_wait_for_busresets() and
init_ohci1394_reset_and_init_dma() are never called in atomic context.

They call 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@gmail.com>
---
 drivers/firewire/init_ohci1394_dma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firewire/init_ohci1394_dma.c b/drivers/firewire/init_ohci1394_dma.c
index 2cc89ce745c9..6b5a3c12f715 100644
--- a/drivers/firewire/init_ohci1394_dma.c
+++ b/drivers/firewire/init_ohci1394_dma.c
@@ -192,7 +192,7 @@ static inline void __init init_ohci1394_wait_for_busresets(struct ohci *ohci)
 	int i, events;
 
 	for (i = 0; i < 9; i++) {
-		mdelay(200);
+		msleep(200);
 		events = reg_read(ohci, OHCI1394_IntEventSet);
 		if (events & OHCI1394_busReset)
 			reg_write(ohci, OHCI1394_IntEventClear,
@@ -228,7 +228,7 @@ static inline void __init init_ohci1394_reset_and_init_dma(struct ohci *ohci)
 	reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff);
 	reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff);
 
-	mdelay(50); /* Wait 50msec to make sure we have full link enabled */
+	msleep(50); /* Wait 50msec to make sure we have full link enabled */
 
 	init_ohci1394_initialize(ohci);
 	/*
-- 
2.17.0


                 reply	other threads:[~2018-07-23 14:21 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180723142104.3477-1-baijiaju1990@gmail.com \
    --to=baijiaju1990@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux1394-devel@lists.sourceforge.net \
    --cc=stefanr@s5r6.in-berlin.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.