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USB: ehci-omap.c: introduce missing kfree

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Error handling code following a kzalloc should free the allocated data.

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@

x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
     when != if (...) { <+...x...+> }
(
x->f1 = E
|
 (x->f1 == NULL || ...)
|
 f(...,x->f1,...)
)
...>
(
 return \(0\|<+...x...+>\|ptr\);
|
 return@p2 ...;
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Julia Lawall 2009-11-21 12:52:17 +01:00 committed by Greg Kroah-Hartman
parent 06e182911d
commit b2b6080905
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/host/ehci-omap.c
View File

@ -558,7 +558,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
omap = kzalloc(sizeof(*omap), GFP_KERNEL);
if (!omap) {
ret = -ENOMEM;
goto err_create_hcd;
goto err_disabled;
}
hcd = usb_create_hcd(&ehci_omap_hc_driver, &pdev->dev,
@ -653,6 +653,7 @@ err_ioremap:
usb_put_hcd(hcd);
err_create_hcd:
kfree(omap);
err_disabled:
err_pdata:
return ret;