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From: Johan Hovold <johan@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, Johan Hovold <johan@kernel.org>
Subject: [PATCH 3/3] USB: usb-skeleton: drop redundant in-urb check
Date: Wed,  9 Oct 2019 19:09:44 +0200	[thread overview]
Message-ID: <20191009170944.30057-4-johan@kernel.org> (raw)
In-Reply-To: <20191009170944.30057-1-johan@kernel.org>

The driver bails out at probe if we can't find a bulk-in endpoint or
if we fail to allocate the URB, so drop the check in read().

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/usb-skeleton.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index be311787403e..2dc58766273a 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -230,8 +230,7 @@ static ssize_t skel_read(struct file *file, char *buffer, size_t count,
 
 	dev = file->private_data;
 
-	/* if we cannot read at all, return EOF */
-	if (!dev->bulk_in_urb || !count)
+	if (!count)
 		return 0;
 
 	/* no concurrent readers */
-- 
2.23.0


      parent reply	other threads:[~2019-10-09 17:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-09 17:09 [PATCH 0/3] USB: usb-skeleton: regression fix Johan Hovold
2019-10-09 17:09 ` [PATCH 1/3] USB: usb-skeleton: fix NULL-deref on disconnect Johan Hovold
2019-10-09 17:09 ` [PATCH 2/3] USB: usb-skeleton: fix use-after-free after driver unbind Johan Hovold
2019-10-09 17:09 ` Johan Hovold [this message]

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