From: Brian Norris <computersforpeace@gmail.com>
Date: Wed, 5 Nov 2014 10:32:03 +0000 (-0800)
Subject: mtd: spi-nor: improve wait-till-ready timeout loop
X-Git-Tag: omap-for-v3.19/fixes-rc1~56^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a95ce92e4b289228c51114dd19f714388093d52b;p=pandora-kernel.git

mtd: spi-nor: improve wait-till-ready timeout loop

There are a few small issues with the timeout loop in
spi_nor_wait_till_ready():

 * The first operation should not be a reschedule; we should check the
   status register at least once to see if we're complete!

 * We should check the status register one last time after declaring the
   deadline has passed, to prevent a premature timeout error (this is
   theoretically possible if we sleep for a long time after the previous
   status register check).

 * Add an error message, so it's obvious if we ever hit a timeout.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Huang Shijie <shijie.huang@intel.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
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