linux-kernel - [PATCH] re: drivers: Probable misuses of ||

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Date:	Mon, 07 May 2012 16:22:52 +0100
From:	Malcolm Priestley <tvboxspy@...il.com>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	linux-media@...r.kernel.org
Cc:	Joe Perches <joe@...ches.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: [PATCH] re: drivers: Probable misuses of || -  it913x.c

On Mon, 2012-05-07 at 07:45 -0300, Mauro Carvalho Chehab wrote:
> Malcolm,
> 
> Em 04-04-2012 20:00, Joe Perches escreveu:
> > Likely these should be && not ||
> > 
> > drivers/scsi/FlashPoint.c:				if(bit_cnt != 0 || bit_cnt != 8)
> 
> > drivers/media/dvb/dvb-usb/it913x.c:		if (ret == 0 || ret != -EBUSY || ret != -ETIMEDOUT)
> > drivers/media/dvb/dvb-usb/it913x.c:		if (ret == 0 || ret != -EBUSY || ret != -ETIMEDOUT)
> 
> Could you please take a look on the above?

Hmm... yes, thanks, also a bug.

Just check for -EBUSY && -ETIMEDOUT

Signed-off-by: Malcolm Priestley <tvboxspy@...il.com>
---
 drivers/media/dvb/dvb-usb/it913x.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/dvb/dvb-usb/it913x.c b/drivers/media/dvb/dvb-usb/it913x.c
index 482d249..6244fe9 100644
--- a/drivers/media/dvb/dvb-usb/it913x.c
+++ b/drivers/media/dvb/dvb-usb/it913x.c
@@ -81,7 +81,7 @@ static int it913x_bulk_write(struct usb_device *dev,
 	for (i = 0; i < IT913X_RETRY; i++) {
 		ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, pipe),
 				snd, len , &actual_l, IT913X_SND_TIMEOUT);
-		if (ret == 0 || ret != -EBUSY || ret != -ETIMEDOUT)
+		if (ret != -EBUSY && ret != -ETIMEDOUT)
 			break;
 	}
 
@@ -99,7 +99,7 @@ static int it913x_bulk_read(struct usb_device *dev,
 	for (i = 0; i < IT913X_RETRY; i++) {
 		ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, pipe),
 				 rev, len , &actual_l, IT913X_RCV_TIMEOUT);
-		if (ret == 0 || ret != -EBUSY || ret != -ETIMEDOUT)
+		if (ret != -EBUSY && ret != -ETIMEDOUT)
 			break;
 	}
 
-- 
1.7.9.5


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