[ARM] MX1/MX2 DMA: add missing local_irq_restore()

This patch adds a missing call to local_irq_restore() and fixes some
compiler warnings about unused variables for MX1.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/arm/plat-mxc/dma-mx1-mx2.c b/arch/arm/plat-mxc/dma-mx1-mx2.c
index e1c2eb497fbc..2905ec758758 100644
--- a/arch/arm/plat-mxc/dma-mx1-mx2.c
+++ b/arch/arm/plat-mxc/dma-mx1-mx2.c
@@ -511,6 +511,7 @@ void imx_dma_disable(int channel)
 }
 EXPORT_SYMBOL(imx_dma_disable);
 
+#ifdef CONFIG_ARCH_MX2
 static void imx_dma_watchdog(unsigned long chno)
 {
         struct imx_dma_channel *imxdma = &imx_dma_channels[chno];
@@ -522,6 +523,7 @@ static void imx_dma_watchdog(unsigned long chno)
         if (imxdma->err_handler)
                 imxdma->err_handler(chno, imxdma->data, IMX_DMA_ERR_TIMEOUT);
 }
+#endif
 
 static irqreturn_t dma_err_handler(int irq, void *dev_id)
 {
@@ -674,7 +676,7 @@ int imx_dma_request(int channel, const char *name)
 {
         struct imx_dma_channel *imxdma = &imx_dma_channels[channel];
         unsigned long flags;
-        int ret;
+        int ret = 0;
 
         /* basic sanity checks */
         if (!name)
@@ -696,6 +698,7 @@ int imx_dma_request(int channel, const char *name)
         ret = request_irq(MXC_INT_DMACH0 + channel, dma_irq_handler, 0, "DMA",
                         NULL);
         if (ret) {
+                local_irq_restore(flags);
                 printk(KERN_CRIT "Can't register IRQ %d for DMA channel %d\n",
                                 MXC_INT_DMACH0 + channel, channel);
                 return ret;
@@ -712,7 +715,7 @@ int imx_dma_request(int channel, const char *name)
         imxdma->sg = NULL;
 
         local_irq_restore(flags);
-        return 0;
+        return ret;
 }
 EXPORT_SYMBOL(imx_dma_request);