From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Thu, 10 Jul 2014 13:29:32 +0000 (+0200)
Subject: spi: core: Fix check for dma_map_sg() failures
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~157^2~7^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89e4b66a2e34744615c79349aa936df1b4204faf;p=pandora-kernel.git

spi: core: Fix check for dma_map_sg() failures

According to Documentation/DMA-API.txt, dma_map_sg() returns 0 on failure.
As spi_map_buf() returns an error code, convert zero into -ENOMEM.
Keep the existing check for negative numbers just in case.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
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