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Message-Id: <d4235bd2b9274e99f6c86ea71b1fa1c7bd8d0c08.1505687047.git.christophe.jaillet@wanadoo.fr> Date: Mon, 18 Sep 2017 00:33:06 +0200 From: Christophe JAILLET <christophe.jaillet@...adoo.fr> To: mporter@...nel.crashing.org, alexandre.bounine@....com, lstoakes@...il.com, akpm@...ux-foundation.org, jesper.nilsson@...s.com, christian.koenig@....com, logang@...tatee.com Cc: linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org, Christophe JAILLET <christophe.jaillet@...adoo.fr> Subject: [PATCH 2/2] rapidio: Fix an error handling in 'rio_dma_transfer()' In case of error, 'dma_map_sg()' returns 0, not a negative value. There is BUG_ON() in 'dma_map_sg_attrs()' which makes sure of that. Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr> --- drivers/rapidio/devices/rio_mport_cdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index 76afe1449cab..3dd37e35cf4e 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -961,7 +961,7 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, nents = dma_map_sg(chan->device->dev, req->sgt.sgl, req->sgt.nents, dir); - if (nents == -EFAULT) { + if (nents == 0) { rmcd_error("Failed to map SG list"); ret = -EFAULT; goto err_pg; -- 2.11.0
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