dmaengine: mv_xor: Fix a missing check in mv_xor_channel_add

dma_async_device_register() may fail and return an error. The capabilities
checked in mv_xor_channel_add() are not complete. The fix handles the
error by freeing the resources.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 7f595355fb79..e733c5eeaabc 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1153,7 +1153,10 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
                  dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "",
                  dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : "");
 
-        dma_async_device_register(dma_dev);
+        ret = dma_async_device_register(dma_dev);
+        if (ret)
+                goto err_free_irq;
+
         return mv_chan;
 
 err_free_irq: