[alsa-devel] [PATCH 1/15] sound/soc/mxs/mxs-saif.c: add missing iounmap

[Julia Lawall]

From: Julia Lawall <Julia.Lawall at lip6.fr>

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

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 at lip6.fr>

---
 sound/soc/mxs/mxs-saif.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c
index 049e543..5ee0adb 100644
--- a/sound/soc/mxs/mxs-saif.c
+++ b/sound/soc/mxs/mxs-saif.c
@@ -680,7 +680,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
 		ret = -ENODEV;
 		dev_err(&pdev->dev, "failed to get dma resource: %d\n",
 			ret);
-		goto failed_ioremap;
+		goto failed_get_resource;
 	}
 	saif->dma_param.chan_num = dmares->start;
 
@@ -739,6 +739,7 @@ failed_register:
 failed_get_irq2:
 	free_irq(saif->irq, saif);
 failed_get_irq1:
+failed_get_resource:
 	iounmap(saif->base);
 failed_ioremap:
 	release_mem_region(iores->start, resource_size(iores));