From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: marcel@holtmann.org, johan.hedberg@gmail.com
Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org,
Jia-Ju Bai <baijiaju1990@gmail.com>
Subject: [PATCH] bluetooth: hci_intel: Replace GFP_ATOMIC with GFP_KERNEL in inject_cmd_complete()
Date: Mon, 23 Jul 2018 11:53:21 +0800 [thread overview]
Message-ID: <20180723035321.8270-1-baijiaju1990@gmail.com> (raw)
inject_cmd_complete() is only called by intel_dequeue(),
which is never called in atomic context.
inject_cmd_complete() calls bt_skb_alloc() 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.
I also manually check the kernel code before reporting it.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
---
drivers/bluetooth/hci_intel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index 7c166e3b308b..46ace321bf60 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -458,7 +458,7 @@ static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
struct hci_event_hdr *hdr;
struct hci_ev_cmd_complete *evt;
- skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
+ skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
if (!skb)
return -ENOMEM;
--
2.17.0
reply other threads:[~2018-07-23 3:53 UTC|newest]
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