From: Alan Cox <alan@linux.intel.com>
Date: Wed, 7 Apr 2010 23:49:31 +0000 (-0700)
Subject: caif: check write operations
X-Git-Tag: v2.6.35-rc1~473^2~543
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c93f09402106f22601838ee2bb0d02bae934b5e5;p=pandora-kernel.git

caif: check write operations

write is optional for a tty device. Check that we have a write op rather
than calling NULL.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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