From: Roland Stigge <stigge@antcom.de>
Date: Wed, 30 Jan 2013 17:05:08 +0000 (+0100)
Subject: mmc: mmc_spi: Fix return value evaluation of irq_of_parse_and_map()
X-Git-Tag: v3.9-rc1~78^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=073350f7b562d06df0aedd36c963508e36437b3c;p=pandora-kernel.git

mmc: mmc_spi: Fix return value evaluation of irq_of_parse_and_map()

When irq_of_parse_and_map() returns an error, it does as zero. But in
mmc_spi_get_pdata(), the error return case is compared against NO_IRQ.
This might work where NO_IRQ is zero (defaults to zero when undefined,
as on MIPS) but not where NO_IRQ is different, e.g. on ARM where it's -1.

This patch changes to comparison with 0 which is the error return value
of irq_of_parse_and_map().

Tested on ARM that mmc_spi is working now.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
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