[PATCH] net: cisco: enic: Replace GFP_ATOMIC with GFP_KERNEL

[PATCH] net: cisco: enic: Replace GFP_ATOMIC with GFP_KERNEL

[Jia-Ju Bai]

vnic_dev_register(), vnic_rq_alloc_bufs() and vnic_wq_alloc_bufs() 
are never called in atomic context.
They call kzalloc() with GFP_ATOMIC, which is not necessary.
GFP_ATOMIC can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
---
 drivers/net/ethernet/cisco/enic/vnic_dev.c | 2 +-
 drivers/net/ethernet/cisco/enic/vnic_rq.c  | 2 +-
 drivers/net/ethernet/cisco/enic/vnic_wq.c  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.c b/drivers/net/ethernet/cisco/enic/vnic_dev.c
index 76cdd4c9d11f..5c08c4519695 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_dev.c
+++ b/drivers/net/ethernet/cisco/enic/vnic_dev.c
@@ -1071,7 +1071,7 @@ struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 	unsigned int num_bars)
 {
 	if (!vdev) {
-		vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
+		vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
 		if (!vdev)
 			return NULL;
 	}
diff --git a/drivers/net/ethernet/cisco/enic/vnic_rq.c b/drivers/net/ethernet/cisco/enic/vnic_rq.c
index f8aa326d1d58..a3e7b003ada1 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_rq.c
+++ b/drivers/net/ethernet/cisco/enic/vnic_rq.c
@@ -35,7 +35,7 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
 	unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
 
 	for (i = 0; i < blks; i++) {
-		rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ(count), GFP_ATOMIC);
+		rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ(count), GFP_KERNEL);
 		if (!rq->bufs[i])
 			return -ENOMEM;
 	}
diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.c b/drivers/net/ethernet/cisco/enic/vnic_wq.c
index 090cc65658a3..eb75891974df 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_wq.c
+++ b/drivers/net/ethernet/cisco/enic/vnic_wq.c
@@ -35,7 +35,7 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
 	unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
 
 	for (i = 0; i < blks; i++) {
-		wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC);
+		wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_KERNEL);
 		if (!wq->bufs[i])
 			return -ENOMEM;
 	}
-- 
2.17.0

Re: [PATCH] net: cisco: enic: Replace GFP_ATOMIC with GFP_KERNEL

[Govindarajulu Varadarajan (gvaradar)]

On Sat, 2018-08-04 at 08:40 +0800, Jia-Ju Bai wrote:
> vnic_dev_register(), vnic_rq_alloc_bufs() and vnic_wq_alloc_bufs() 
> are never called in atomic context.
> They call kzalloc() with GFP_ATOMIC, which is not necessary.
> GFP_ATOMIC can be replaced with GFP_KERNEL.
> 
> This is found by a static analysis tool named DCNS written by myself.

Looks good to me. Thanks you.

Acked-by: Govindarajulu Varadarajan <gvaradar@cisco.com>

Re: [PATCH] net: cisco: enic: Replace GFP_ATOMIC with GFP_KERNEL

[David Miller]

From: Jia-Ju Bai <baijiaju1990@gmail.com>
Date: Sat,  4 Aug 2018 08:40:09 +0800

> vnic_dev_register(), vnic_rq_alloc_bufs() and vnic_wq_alloc_bufs() 
> are never called in atomic context.
> They call kzalloc() with GFP_ATOMIC, which is not necessary.
> GFP_ATOMIC can be replaced with GFP_KERNEL.
> 
> This is found by a static analysis tool named DCNS written by myself.
> 
> Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>

Applied to net-next, thanks.