misc: fastrpc: add checked value for dma_set_mask

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.yubo@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 39f832d..36d0d5c 100644 (file)
--- 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;
 }