drivers/dma/pl330.c: add missing iounmap

Add missing iounmap in error handling code, in a case where the function
already preforms iounmap on some other execution path.

This patch additionally adds calls to clk_disable and clk_put.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
statement S,S1;
int ret;
@@
e = \(ioremap\|ioremap_nocache\)(...)
... when != iounmap(e)
if (<+...e...+>) S
... when any
    when != iounmap(e)
*if (...)
   { ... when != iounmap(e)
     return ...; }
... when any
iounmap(e);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index b8ec03ee8e22..84ebea9bc53a 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -829,7 +829,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
         if (IS_ERR(pdmac->clk)) {
                 dev_err(&adev->dev, "Cannot get operation clock.\n");
                 ret = -EINVAL;
-                goto probe_err1;
+                goto probe_err2;
         }
 
         amba_set_drvdata(adev, pdmac);
@@ -843,11 +843,11 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
         ret = request_irq(irq, pl330_irq_handler, 0,
                         dev_name(&adev->dev), pi);
         if (ret)
-                goto probe_err2;
+                goto probe_err3;
 
         ret = pl330_add(pi);
         if (ret)
-                goto probe_err3;
+                goto probe_err4;
 
         INIT_LIST_HEAD(&pdmac->desc_pool);
         spin_lock_init(&pdmac->pool_lock);
@@ -904,7 +904,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
         ret = dma_async_device_register(pd);
         if (ret) {
                 dev_err(&adev->dev, "unable to register DMAC\n");
-                goto probe_err4;
+                goto probe_err5;
         }
 
         dev_info(&adev->dev,
@@ -917,10 +917,15 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 
         return 0;
 
-probe_err4:
+probe_err5:
         pl330_del(pi);
-probe_err3:
+probe_err4:
         free_irq(irq, pi);
+probe_err3:
+#ifndef CONFIG_PM_RUNTIME
+        clk_disable(pdmac->clk);
+#endif
+        clk_put(pdmac->clk);
 probe_err2:
         iounmap(pi->base);
 probe_err1: