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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>
This commit is contained in:
Julia Lawall 2012-01-12 10:55:06 +01:00 committed by Vinod Koul
parent 2b4f130e05
commit 7bec78e0a8
1 changed files with 11 additions and 6 deletions
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17
drivers/dma/pl330.c
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@ -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: