From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Arend van Spriel" Date: Sat, 29 Oct 2011 09:36:55 +0000 Subject: Re: [PATCH 3/5] drivers/hid/hid-roccat.c: eliminate a null Message-Id: <4EABC937.60600@broadcom.com> List-Id: References: <1319846297-2985-3-git-send-email-julia@diku.dk> <20111029062412.GG14881@longonot.mountain> In-Reply-To: <20111029062412.GG14881@longonot.mountain> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Dan Carpenter Cc: Julia Lawall , Jiri Kosina , "kernel-janitors@vger.kernel.org" , "linux-input@vger.kernel.org" , "linux-kernel@vger.kernel.org" On 10/29/2011 08:24 AM, Dan Carpenter wrote: > On Sat, Oct 29, 2011 at 01:58:15AM +0200, Julia Lawall wrote: >> diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c >> index 2596321..36a28b8 100644 >> --- a/drivers/hid/hid-roccat.c >> +++ b/drivers/hid/hid-roccat.c >> @@ -163,14 +163,15 @@ static int roccat_open(struct inode *inode, struct file *file) >> >> device = devices[minor]; >> >> - mutex_lock(&device->readers_lock); >> - >> if (!device) { >> pr_emerg("roccat device with minor %d doesn't exist\n", minor); >> - error = -ENODEV; >> - goto exit_err; >> + kfree(reader); >> + mutex_lock(&devices_lock); > > Typo. mutex_unlock() instead of mutex_lock(). This is no typo, but simply wrong. Remove the mutex_lock() as we are leaving the function here in error flow. >> + return -ENODEV; >> } >> >> + mutex_lock(&device->readers_lock); >> + >> if (!device->open++) { >> /* power on device on adding first reader */ >> error = hid_hw_power(device->hid, PM_HINT_FULLON); >> > > regards, > dan carpenter Gr. AvS