[PATCH V2] misc: fastrpc: add checked value for dma_set_mask

[Bo YU]

There be should check return value from dma_set_mask to throw some info
if fail to set dma mask.

Detected by CoverityScan, CID# 1443983:  Error handling issues (CHECKED_RETURN)

Fixes:f6f9279f2bf0 (misc: fastrpc: Add Qualcomm fastrpc basic driver model)
Signed-off-by: Bo YU <tsu.y...@gmail.com>
---
V2: rebase misc tree
---
 drivers/misc/fastrpc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 39f832d27288..36d0d5c9cfba 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1184,6 +1184,7 @@ static int fastrpc_cb_probe(struct platform_device *pdev)
        struct fastrpc_session_ctx *sess;
        struct device *dev = &pdev->dev;
        int i, sessions = 0;
+       int rc;

        cctx = dev_get_drvdata(dev->parent);
        if (!cctx)
@@ -1213,7 +1214,11 @@ static int fastrpc_cb_probe(struct platform_device *pdev)
        }
        cctx->sesscount++;
        spin_unlock(&cctx->lock);
-       dma_set_mask(dev, DMA_BIT_MASK(32));
+       rc = dma_set_mask(dev, DMA_BIT_MASK(32));
+       if (rc) {
+               dev_err(dev, "32-bit DMA enable failed\n");
+               return rc;
+       }

        return 0;
 }
--
2.11.0