From 89e4b66a2e34744615c79349aa936df1b4204faf Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Thu, 10 Jul 2014 15:29:32 +0200
Subject: [PATCH] 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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Reading git-format-patch failed