omap: SDMA: Fix omap_stop_dma() API for channel linking

OMAP sDMA driver API omap_stop_dma() doesn't really stop the dma when used
in linking scenario.

The DMA channel needs to be disabled before resetting the chain.
Also fix clearing of the OMAP_DMA_ACTIVE status in the linked case.

Cc: Hari n <hari.zoom@gmail.com>
Cc: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 0eb676d..b53125f 100644 (file)
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -978,6 +978,14 @@ void omap_stop_dma(int lch)
 {
        u32 l;
 
+       /* Disable all interrupts on the channel */
+       if (cpu_class_is_omap1())
+               dma_write(0, CICR(lch));
+
+       l = dma_read(CCR(lch));
+       l &= ~OMAP_DMA_CCR_EN;
+       dma_write(l, CCR(lch));
+
        if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
                int next_lch, cur_lch = lch;
                char dma_chan_link_map[OMAP_DMA4_LOGICAL_DMA_CH_COUNT];
@@ -995,18 +1003,8 @@ void omap_stop_dma(int lch)
                        next_lch = dma_chan[cur_lch].next_lch;
                        cur_lch = next_lch;
                } while (next_lch != -1);
-
-               return;
        }
 
-       /* Disable all interrupts on the channel */
-       if (cpu_class_is_omap1())
-               dma_write(0, CICR(lch));
-
-       l = dma_read(CCR(lch));
-       l &= ~OMAP_DMA_CCR_EN;
-       dma_write(l, CCR(lch));
-
        dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
 }
 EXPORT_SYMBOL(omap_stop_dma);