usb: musb: cppi41: fix missing unlock on error in cppi41_dma_callback()

Add the missing unlock before return from function cppi41_dma_callback()
in the error handling case.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index e64701d15401..ae959746f77f 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -150,8 +150,10 @@ static void cppi41_dma_callback(void *private_data)
                                 remain_bytes,
                                 direction,
                                 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-                if (WARN_ON(!dma_desc))
+                if (WARN_ON(!dma_desc)) {
+                        spin_unlock_irqrestore(&musb->lock, flags);
                         return;
+                }
 
                 dma_desc->callback = cppi41_dma_callback;
                 dma_desc->callback_param = channel;