| Message ID | 1523431986-3596-1-git-send-email-baijiaju1990@gmail.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Jason Gunthorpe |
| Headers | show |
On Wed, Apr 11, 2018 at 03:33:06PM +0800, Jia-Ju Bai wrote: > i40iw_l2param_change() is never called in atomic context. > > i40iw_make_listen_node() is only set as ".l2_param_change" > in struct i40e_client_ops, and this function pointer is not called > in atomic context. > > Despite never getting called from atomic context, > i40iw_l2param_change() 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_main.c b/drivers/infiniband/hw/i40iw/i40iw_main.c index 27590ae..b86bda8 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_main.c +++ b/drivers/infiniband/hw/i40iw/i40iw_main.c @@ -1737,7 +1737,7 @@ static void i40iw_l2param_change(struct i40e_info *ldev, struct i40e_client *cli return; - work = kzalloc(sizeof(*work), GFP_ATOMIC); + work = kzalloc(sizeof(*work), GFP_KERNEL); if (!work) return;
i40iw_l2param_change() is never called in atomic context. i40iw_make_listen_node() is only set as ".l2_param_change" in struct i40e_client_ops, and this function pointer is not called in atomic context. Despite never getting called from atomic context, i40iw_l2param_change() 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_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)