| Message ID | 1523431968-3552-1-git-send-email-baijiaju1990@gmail.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Jason Gunthorpe |
| Headers | show |
On Wed, Apr 11, 2018 at 03:32:48PM +0800, Jia-Ju Bai wrote: > i40iw_make_listen_node() is never called in atomic context. > > i40iw_make_listen_node() is only called by i40iw_create_listen, which is > set as ".create_listen" in struct iw_cm_verbs. > > Despite never getting called from atomic context, > i40iw_make_listen_node() calls kzalloc() with GFP_ATOMIC, > which does not sleep for allocation. > GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL, > which can sleep and improve the possibility of sucessful allocation. > > This is found by a static analysis tool named DCNS written by myself. > And I also manually check it. > > Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> > --- > Acked-by: Shiraz Saleem <shiraz.saleem@intel.com> -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c index 5230dd3..d021399 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.c +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c @@ -2834,7 +2834,7 @@ static struct i40iw_cm_listener *i40iw_make_listen_node( if (!listener) { /* create a CM listen node (1/2 node to compare incoming traffic to) */ - listener = kzalloc(sizeof(*listener), GFP_ATOMIC); + listener = kzalloc(sizeof(*listener), GFP_KERNEL); if (!listener) return NULL; cm_core->stats_listen_nodes_created++;
i40iw_make_listen_node() is never called in atomic context. i40iw_make_listen_node() is only called by i40iw_create_listen, which is set as ".create_listen" in struct iw_cm_verbs. Despite never getting called from atomic context, i40iw_make_listen_node() calls kzalloc() with GFP_ATOMIC, which does not sleep for allocation. GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL, which can sleep and improve the possibility of sucessful allocation. This is found by a static analysis tool named DCNS written by myself. And I also manually check it. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> --- drivers/infiniband/hw/i40iw/i40iw_cm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)