[PATCH 2/2] rapidio: Fix an error handling in 'rio_dma_transfer()'

[Christophe JAILLET]

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.jail...@wanadoo.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