From: Alexander Stein <alexander.stein@systec-electronic.com>
Date: Wed, 26 Feb 2014 15:31:19 +0000 (+0100)
Subject: spi-topcliff-pch: Fix probing when DMA mode is used
X-Git-Tag: v3.14-rc6~7^2^7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7995d74ab297e4f5526c8df70007e1e39f0d1f5c;p=pandora-kernel.git

spi-topcliff-pch: Fix probing when DMA mode is used

If during registering SPI master due to SPI device probing a SPI transfer
is issued the DMA buffers are not allocated yet.

This fixes the following oops:
pch_spi 0000:02:0c.1: enabling device (0000 -> 0002)
pch_spi 0000:02:0c.1: master is unqueued, this is deprecated
BUG: unable to handle kernel NULL pointer dereference at   (null)
IP: [<c125aa05>] pch_spi_handle_dma+0x15c/0x6f4
[...]

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
---

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