From: Daniel Mack <zonque@gmail.com>
Date: Sun, 3 Mar 2013 23:57:20 +0000 (+0100)
Subject: mtd: devices: elm: check for device's presence before configuration
X-Git-Tag: v3.10-rc1~36^2~57
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad2457894c272279bf73ca46ae5ea5de4876d2a0;p=pandora-kernel.git

mtd: devices: elm: check for device's presence before configuration

In case the driver is not probed - due to config mismatches or errors
in the DTS files - dev_get_drvdata() returns NULL, leading to an Ooops
during boot.

Make elm_config() return an error in such cases to propagate the error
up to the user, so it can fall back to software mode.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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