* [PATCH 1/4] fujitsu-laptop: Correct redundant test
@ 2009-07-31 8:42 Jonathan Woithe
2009-08-27 22:56 ` Len Brown
0 siblings, 1 reply; 2+ messages in thread
From: Jonathan Woithe @ 2009-07-31 8:42 UTC (permalink / raw)
To: linux-acpi
Cc: Jonathan Woithe, linux-kernel, julia, bzolnier, kernel-janitors
From: Julia Lawall <julia@diku.dk>
device and acpi_driver_data(device) were tested just a few lines above.
A simplified version of the semantic match that finds this problem is as
follows: (http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
expression E;
@@
if (x == NULL || ...) { ... when forall
return ...; }
.. when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\)
(
*x == NULL
|
*x != NULL
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
--- a/drivers/platform/x86/fujitsu-laptop.c 2009-07-31 16:55:09.389775000 +0930
+++ b/drivers/platform/x86/fujitsu-laptop.c 2009-07-31 17:13:01.160777027 +0930
@@ -745,9 +745,6 @@ static int acpi_fujitsu_remove(struct ac
fujitsu = acpi_driver_data(device);
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
-
fujitsu->acpi_handle = NULL;
return 0;
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