dmaengine: coh901318: fix function return types build warnings

A recent patch that removed coh901318_control() replaced it
with a number of pointers to existing functions, but those
unfortunately have the wrong return  type and need to be
changed to return an 'int' with an error value rather than
a 'void' to avoid these build warnings:

drivers/dma/coh901318.c:2697:32: warning: assignment from incompatible pointer type
  base->dma_slave.device_config = coh901318_dma_set_runtimeconfig;
                                ^
drivers/dma/coh901318.c:2698:31: warning: assignment from incompatible pointer type
  base->dma_slave.device_pause = coh901318_pause;
                               ^
drivers/dma/coh901318.c:2699:32: warning: assignment from incompatible pointer type
  base->dma_slave.device_resume = coh901318_resume

The coh901318_base_init function has the correct return type
already, but needs to be marked 'static' to avoid a sparse
warning about a missing declaration.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 6782af118b6c ("dmaengine: coh901318: Split device_control")
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 12 insertions, 8 deletions

diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 418e4e4fb7ba..fd22dd36985f 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1690,7 +1690,7 @@ static u32 coh901318_get_bytes_left(struct dma_chan *chan)
  * Pauses a transfer without losing data. Enables power save.
  * Use this function in conjunction with coh901318_resume.
  */
-static void coh901318_pause(struct dma_chan *chan)
+static int coh901318_pause(struct dma_chan *chan)
 {
         u32 val;
         unsigned long flags;
@@ -1730,12 +1730,13 @@ static void coh901318_pause(struct dma_chan *chan)
         enable_powersave(cohc);
 
         spin_unlock_irqrestore(&cohc->lock, flags);
+        return 0;
 }
 
 /* Resumes a transfer that has been stopped via 300_dma_stop(..).
    Power save is handled.
 */
-static void coh901318_resume(struct dma_chan *chan)
+static int coh901318_resume(struct dma_chan *chan)
 {
         u32 val;
         unsigned long flags;
@@ -1760,6 +1761,7 @@ static void coh901318_resume(struct dma_chan *chan)
         }
 
         spin_unlock_irqrestore(&cohc->lock, flags);
+        return 0;
 }
 
 bool coh901318_filter_id(struct dma_chan *chan, void *chan_id)
@@ -2512,8 +2514,8 @@ static const struct burst_table burst_sizes[] = {
         },
 };
 
-static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
-                        struct dma_slave_config *config)
+static int coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
+                                           struct dma_slave_config *config)
 {
         struct coh901318_chan *cohc = to_coh901318_chan(chan);
         dma_addr_t addr;
@@ -2533,7 +2535,7 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
                 maxburst = config->dst_maxburst;
         } else {
                 dev_err(COHC_2_DEV(cohc), "illegal channel mode\n");
-                return;
+                return -EINVAL;
         }
 
         dev_dbg(COHC_2_DEV(cohc), "configure channel for %d byte transfers\n",
@@ -2579,7 +2581,7 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
         default:
                 dev_err(COHC_2_DEV(cohc),
                         "bad runtimeconfig: alien address width\n");
-                return;
+                return -EINVAL;
         }
 
         ctrl |= burst_sizes[i].reg;
@@ -2589,10 +2591,12 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
 
         cohc->addr = addr;
         cohc->ctrl = ctrl;
+
+        return 0;
 }
 
-void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
-                         struct coh901318_base *base)
+static void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
+                                struct coh901318_base *base)
 {
         int chans_i;
         int i = 0;