From 99be3e371b2ac03b936044139be10cf0c7b9cc58 Mon Sep 17 00:00:00 2001
From: Vladimir Zapolskiy <vz@mleia.com>
Date: Wed, 5 Aug 2015 21:13:02 +0300
Subject: [PATCH] rtc: m48t59: clean up
 m48t59_nvram_read()/m48t59_nvram_write()

The change removes redundant sysfs binary file boundary checks, since
this task is already done on caller side in fs/sysfs/file.c

Spinlock acquisition/release is moved out of the loop body to get
atomic states of NVRAM reading and writing operations.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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