diff options
author | Julien Brunel <brunel@diku.dk> | 2008-08-21 21:46:30 +0400 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-08-21 21:46:39 +0400 |
commit | 0983e56835cbf4796e8f5780c549c32ac1c3afac (patch) | |
tree | d0a98012929abcd12d95c7a96184a69b1b1d4c6b /drivers/s390/block/dasd_eer.c | |
parent | 6a55617ed5d1aa62b850de2cf66f5ede2eef4825 (diff) | |
download | linux-0983e56835cbf4796e8f5780c549c32ac1c3afac.tar.xz |
[S390] drivers/s390: Use an IS_ERR test rather than a NULL test
In case of error, functions dasd_kmalloc_request and idal_buffer_alloc
return an ERR pointer, but never return the NULL pointer. So after a
call to one of these functions, a NULL test should be replaced by an
IS_ERR test.
A simplified version of the semantic patch that makes this change is
as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@correct_null_test@
expression x,E;
statement S1, S2;
@@
x =
(
dasd_kmalloc_request(...)
|
idal_buffer_alloc(...)
)
<... when != x = E
if (
(
- x@p2 != NULL
+ ! IS_ERR ( x )
|
- x@p2 == NULL
+ IS_ERR( x )
)
)
S1
else S2
...>
? x = E;
// </smpl>
Signed-off-by: Julien Brunel <brunel@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd_eer.c')
-rw-r--r-- | drivers/s390/block/dasd_eer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c index 29da4413ad43..bf512ac75b9e 100644 --- a/drivers/s390/block/dasd_eer.c +++ b/drivers/s390/block/dasd_eer.c @@ -16,6 +16,7 @@ #include <linux/poll.h> #include <linux/mutex.h> #include <linux/smp_lock.h> +#include <linux/err.h> #include <asm/uaccess.h> #include <asm/atomic.h> @@ -457,7 +458,7 @@ int dasd_eer_enable(struct dasd_device *device) cqr = dasd_kmalloc_request("ECKD", 1 /* SNSS */, SNSS_DATA_SIZE, device); - if (!cqr) + if (IS_ERR(cqr)) return -ENOMEM; cqr->startdev = device; |