[PATCH] spi: add null check before pointer dereference
From: Gustavo A. R. Silva <hidden>
Date: 2017-05-23 00:25:13
Also in:
linux-arm-kernel, linux-samsung-soc, lkml
Subsystem:
arm/samsung s3c, s5p and exynos arm architectures, samsung spi drivers, spi subsystem, the rest · Maintainers:
Krzysztof Kozlowski, Peter Griffin, Andi Shyti, Mark Brown, Linus Torvalds
Add null check before dereferencing pointer desc Addresses-Coverity-ID: 1397997 Signed-off-by: Gustavo A. R. Silva <redacted> --- drivers/spi/spi-s3c64xx.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index b392cca..9f1013e 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c@@ -306,6 +306,12 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, desc = dmaengine_prep_slave_sg(dma->ch, sgt->sgl, sgt->nents, dma->direction, DMA_PREP_INTERRUPT); + if (!desc) { + dev_err(&sdd->master->dev, + "%s:dmaengine_prep_slave_sg Failed\n", __func__); + return; + } + desc->callback = s3c64xx_spi_dmacb; desc->callback_param = dma;
--
2.5.0