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authorJia-Ju Bai <baijiaju1990@gmail.com>2018-04-10 21:17:29 +0800
committerJon Mason <jdmason@kudzu.us>2018-06-11 15:20:59 -0400
commit82edcc758f273ed3afd308746dd69376d5b1024d (patch)
tree3aa9dfecafb053dfc07a1f2f8673c00fdd30c941 /drivers/ntb
parent081a698639d793d92c28e785d9b5b085698f8008 (diff)
downloadlinux-82edcc758f273ed3afd308746dd69376d5b1024d.tar.bz2
ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ntb_transport_setup_qp_mw
ntb_transport_setup_qp_mw() is never called in atomic context. ntb_transport_setup_qp_mw() is only called by ntb_transport_link_work(), which is set as a parameter of INIT_DELAYED_WORK() in ntb_transport_probe(). Despite never getting called from atomic context, ntb_transport_setup_qp_mw() calls kzalloc_node() 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> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/ntb_transport.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 9878c48826e3..c848fb3d5099 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -637,7 +637,7 @@ static int ntb_transport_setup_qp_mw(struct ntb_transport_ctx *nt,
*/
node = dev_to_node(&ndev->dev);
for (i = qp->rx_alloc_entry; i < qp->rx_max_entry; i++) {
- entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
+ entry = kzalloc_node(sizeof(*entry), GFP_KERNEL, node);
if (!entry)
return -ENOMEM;