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Message-ID: <37EA2F27FEDED94487ADB266632B54EF73001775@IRSMSX107.ger.corp.intel.com>
Date: Mon, 30 Jul 2018 16:15:54 +0000
From: "Kielan, Tymoteusz" <tymoteusz.kielan@...el.com>
To: Jia-Ju Bai <baijiaju1990@...il.com>,
"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH] net: intel: ixgbe: Replace GFP_ATOMIC
with GFP_KERNEL
ACK
-----Original Message-----
From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...osl.org] On Behalf Of Jia-Ju Bai
Sent: Friday, July 27, 2018 10:23 AM
To: Kirsher, Jeffrey T <jeffrey.t.kirsher@...el.com>
Cc: netdev@...r.kernel.org; Jia-Ju Bai <baijiaju1990@...il.com>; intel-wired-lan@...ts.osuosl.org; linux-kernel@...r.kernel.org
Subject: [Intel-wired-lan] [PATCH] net: intel: ixgbe: Replace GFP_ATOMIC with GFP_KERNEL
ixgbe_fcoe_ddp_setup(), ixgbe_setup_fcoe_ddp_resources() and
ixgbe_sw_init() are never called in atomic context.
They call kmalloc(), dma_pool_alloc() and 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@...il.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c | 4 ++-- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
index 7a09a40e4472..ff7ed77ce224 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
@@ -217,7 +217,7 @@ static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
}
/* alloc the udl from per cpu ddp pool */
- ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
+ ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_KERNEL, &ddp->udp);
if (!ddp->udl) {
e_err(drv, "failed allocated ddp context\n");
goto out_noddp_unmap;
@@ -785,7 +785,7 @@ int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
return 0;
/* Extra buffer to be shared by all DDPs for HW work around */
- buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC);
+ buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index afadba99f7b8..fe4a6125576d 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6138,7 +6138,7 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter,
adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
hw->mac.num_rar_entries,
- GFP_ATOMIC);
+ GFP_KERNEL);
if (!adapter->mac_table)
return -ENOMEM;
--
2.17.0
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