Re: [PATCH 1/3] infiniband: i40iw: Replace GFP_ATOMIC with GFP_KERNEL in i40iw_add_mqh_4
From: Shiraz Saleem
Date: Fri Apr 13 2018 - 21:11:04 EST
On Wed, Apr 11, 2018 at 03:32:25PM +0800, Jia-Ju Bai wrote:
> i40iw_add_mqh_4() is never called in atomic context, because it
> calls rtnl_lock() that can sleep.
>
> Despite never getting called from atomic context,
> i40iw_add_mqh_4() calls kzalloc() 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@xxxxxxxxx>
> ---
Acked-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>