Re: [PATCH] bluetooth: btmrvl_main: Replace GFP_ATOMIC with GFP_KERNEL in btmrvl_send_sync_cmd

From: Marcel Holtmann
Date: Wed Feb 07 2018 - 03:55:52 EST


Hi Jia-Ju,

> After checking all possible call chains to btmrvl_send_sync_cmd(),
> my tool finds that this function is never called in atomic context,
> namely never in an interrupt handler or holding a spinlock.
> And it calls wait_event_interruptible_timeout() after bt_skb_alloc(),
> so it indicates that btmrvl_send_sync_cmd()
> can call function which can sleep.
> Thus GFP_ATOMIC is not necessary, and it 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@xxxxxxxxx>
> ---
> drivers/bluetooth/btmrvl_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel