USB: musb: add missing unlock in cppi_interrupt()

We should unlock before returning here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index de55a3c..6385eeb 100644 (file)
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -1167,8 +1167,11 @@ irqreturn_t cppi_interrupt(int irq, void *dev_id)
        tx = musb_readl(tibase, DAVINCI_TXCPPI_MASKED_REG);
        rx = musb_readl(tibase, DAVINCI_RXCPPI_MASKED_REG);
 
-       if (!tx && !rx)
+       if (!tx && !rx) {
+               if (cppi->irq)
+                       spin_unlock_irqrestore(&musb->lock, flags);
                return IRQ_NONE;
+       }
 
        DBG(4, "CPPI IRQ Tx%x Rx%x\n", tx, rx);