On Tue, 17 Jan 2012, Vinod Koul wrote:
On Thu, 2012-01-12 at 10:55 +0100, Julia Lawall wrote:
From: Julia Lawall <Julia.Lawall@xxxxxxx>
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@xxxxxxx>
Acked by Vinod Koul <vinod.koul@xxxxxxxxxxxxxxx>
Which tree is this intended for?
It was generated from linux-next, although I'm not sure if that is the
intended sense of the question.
julia
---
Perhaps clk_put is not needed? It is not present in the remove function.
drivers/dma/pl330.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 2b3aab3..2f83094 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2690,7 +2690,7 @@ 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);
@@ -2704,11 +2704,11 @@ 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);
@@ -2765,7 +2765,7 @@ 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,
@@ -2778,10 +2778,15 @@ 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:
--
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--
~Vinod
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