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| author | Julia Lawall <julia@diku.dk> | 2009-09-13 21:15:18 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-09-17 20:07:43 +0200 |
| commit | 70ebadc8e30efef3bf21ba94b3571537de8bcf4e (patch) | |
| tree | 313727133efb7ea0881d2a78e8f1b83820ce3593 /arch/mips/txx9/generic | |
| parent | 13680ade4e57090a8ccad332e84e1f3d48b67125 (diff) | |
| download | lwn-70ebadc8e30efef3bf21ba94b3571537de8bcf4e.tar.gz lwn-70ebadc8e30efef3bf21ba94b3571537de8bcf4e.zip | |
MIPS: TXx9: Fix error handling.
Error handling code following a kzalloc should free the allocated data.
Error handling code following an ioremap should iounmap the allocated data.
The semantic match that finds the first 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: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/txx9/generic')
| -rw-r--r-- | arch/mips/txx9/generic/setup.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c index a205e2ba8e7b..c860810722c0 100644 --- a/arch/mips/txx9/generic/setup.c +++ b/arch/mips/txx9/generic/setup.c @@ -782,7 +782,7 @@ void __init txx9_iocled_init(unsigned long baseaddr, return; iocled->mmioaddr = ioremap(baseaddr, 1); if (!iocled->mmioaddr) - return; + goto out_free; iocled->chip.get = txx9_iocled_get; iocled->chip.set = txx9_iocled_set; iocled->chip.direction_input = txx9_iocled_dir_in; @@ -791,13 +791,13 @@ void __init txx9_iocled_init(unsigned long baseaddr, iocled->chip.base = basenum; iocled->chip.ngpio = num; if (gpiochip_add(&iocled->chip)) - return; + goto out_unmap; if (basenum < 0) basenum = iocled->chip.base; pdev = platform_device_alloc("leds-gpio", basenum); if (!pdev) - return; + goto out_gpio; iocled->pdata.num_leds = num; iocled->pdata.leds = iocled->leds; for (i = 0; i < num; i++) { @@ -812,7 +812,16 @@ void __init txx9_iocled_init(unsigned long baseaddr, } pdev->dev.platform_data = &iocled->pdata; if (platform_device_add(pdev)) - platform_device_put(pdev); + goto out_pdev; + return; +out_pdev: + platform_device_put(pdev); +out_gpio: + gpio_remove(&iocled->chip); +out_unmap: + iounmap(iocled->mmioaddr); +out_free: + kfree(iocled); } #else /* CONFIG_LEDS_GPIO */ void __init txx9_iocled_init(unsigned long baseaddr, |