From: Daniel Mack <zonque@gmail.com>
Date: Thu, 4 Sep 2014 07:00:23 +0000 (+0200)
Subject: net: ethernet: cpsw: improve interrupt lookup logic in cpsw_probe()
X-Git-Tag: omap-for-v3.19/prcm-cleanup~78^2~155
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2b32e580ccc574cf353661ee6d900947e9fdf28;p=pandora-kernel.git

net: ethernet: cpsw: improve interrupt lookup logic in cpsw_probe()

Simplify the interrupt resource lookup code in cpsw_probe() by the
following:

 * Only look at the first member of the resource. As the driver only
   works for DT-enabled platforms anyway, a resource of type
   IORESOURCE_IRQ will only contain one single entry
   (res->start == res->end), so there is no need for the iteration.

 * Add a bounds check to avoid overflows if we are passed more than
   ARRAY_SIZE(priv->irqs_table) resources.

 * Assign 'ret' with the return value of devm_request_irq() so that
   cpsw_probe() returns the appropriate error code.

 * If devm_request_irq() fails, report the error code in the log
   message.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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