From: Anton Vorontsov <anton.vorontsov@linaro.org>
Date: Sat, 12 May 2012 00:17:17 +0000 (-0700)
Subject: persistent_ram: Fix buffer size clamping during writes
X-Git-Tag: v3.5-rc1~145^2~130
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=484dd30e016eb425b0de871357fff2c9bb93be45;p=pandora-kernel.git

persistent_ram: Fix buffer size clamping during writes

This is a longstanding bug, almost unnoticeable when calling
persistent_ram_write() for small buffers.

But when called for large data buffers, the write routine behaves
incorrectly, as the size may never update: instead of clamping
the size to the maximum buffer size, buffer_size_add_clamp() returns
an error (which is never checked by the write routine, btw).

To fix this, we now use buffer_size_add() that actually clamps the
size to the max value.

Also remove buffer_size_add_clamp(), it is no longer needed.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Colin Cross <ccross@android.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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