From: Julien Brunel <brunel@xxxxxxx> In case of error, the function ucma_alloc_multicast returns a NULL pointer, but never returns an ERR pointer. So after a call to this function, an IS_ERR test should be replaced by a NULL test. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @match bad_is_err_test@ expression x, E; @@ x = ucma_alloc_multicast(...) ... when != x = E IS_ERR(x) // </smpl> Signed-off-by: Julien Brunel <brunel@xxxxxxx> Signed-off-by: Julia Lawall <julia@xxxxxxx> --- drivers/infiniband/core/ucma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff -u -p a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -904,8 +904,8 @@ static ssize_t ucma_join_multicast(struc mutex_lock(&file->mut); mc = ucma_alloc_multicast(ctx); - if (IS_ERR(mc)) { - ret = PTR_ERR(mc); + if (mc == NULL) { + ret = -ENOMEM; goto err1; } -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html