4.9-stable review patch. If anyone has any objections, please let me know.
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From: Christophe JAILLET christophe.jaillet@wanadoo.fr
[ Upstream commit b1402dcb5643b7a27d46a05edd7491d49ba0e248 ]
If 'dma_map_sg()', we should branch to the existing error handling path to free some resources before returning.
Link: http://lkml.kernel.org/r/61292a4f369229eee03394247385e955027283f8.1505687047... Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr Reviewed-by: Logan Gunthorpe logang@deltatee.com Cc: Matt Porter mporter@kernel.crashing.org Cc: Alexandre Bounine alexandre.bounine@idt.com Cc: Lorenzo Stoakes lstoakes@gmail.com Cc: Jesper Nilsson jesper.nilsson@axis.com Cc: Christian K_nig christian.koenig@amd.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/rapidio/devices/rio_mport_cdev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -964,7 +964,8 @@ rio_dma_transfer(struct file *filp, u32 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);