linux-kernel - [PATCH 1/2] rapidio: Fix resources leak in error handling path in 'rio_dma

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Message-Id: <61292a4f369229eee03394247385e955027283f8.1505687047.git.christophe.jaillet@wanadoo.fr>
Date:   Mon, 18 Sep 2017 00:33:05 +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 1/2] rapidio: Fix resources leak in error handling path in 'rio_dma_transfer()'

If 'dma_map_sg()', we should branch to the existing error handling path to
free some resources before returning.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/rapidio/devices/rio_mport_cdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index 5beb0c361076..76afe1449cab 100644
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -963,7 +963,8 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode,
 			   req->sgt.sgl, req->sgt.nents, dir);
 	if (nents == -EFAULT) {
 		rmcd_error("Failed to map SG list");
-		return -EFAULT;
+		ret = -EFAULT;
+		goto err_pg;
 	}
 
 	ret = do_dma_request(req, xfer, sync, nents);
-- 
2.11.0