From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] isdn: Return -EINTR in gigaset_start() if locking
 attempts fails.
Date: Fri, 16 Mar 2012 23:18:56 -0700 (PDT)
Message-ID: <20120316.231856.1071253468993560433.davem@davemloft.net>
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From: santosh nayak <santoshprasadnayak@gmail.com>
Date: Fri, 16 Mar 2012 18:40:13 +0530

> We have 3 callers: gigaset_probe(), gigaset_tty_open() and
> gigaset_probe(). Each caller tries to free allocated memory
> if lock fails. This is possible if we returns -EINTR.

Look again at the callers.

They interpret "0" as an error, so your patch would break the driver.