lkml.org 
[lkml]   [2020]   [Aug]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 2/2] staging: android: Remove BUG from ion_system_heap.c
On Wed, Aug 19, 2020 at 10:39:34PM +0300, Tomer Samara wrote:
> Remove BUG() at ion_sytem_heap.c and error handling to:
> - free_buffer_page
> - alloc_buffer_page
> this fix the following checkpatch issue:
> Avoid crashing the kernel - try using WARN_ON &
> recovery code ratherthan BUG() or BUG_ON().
>
> Signed-off-by: Tomer Samara <tomersamara98@gmail.com>
> ---
> drivers/staging/android/ion/ion_system_heap.c | 15 ++++++++++++---
> 1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
> index eac0632ab4e8..56d53268b82c 100644
> --- a/drivers/staging/android/ion/ion_system_heap.c
> +++ b/drivers/staging/android/ion/ion_system_heap.c
> @@ -30,7 +30,7 @@ static int order_to_index(unsigned int order)
> for (i = 0; i < NUM_ORDERS; i++)
> if (order == orders[i])
> return i;
> - BUG();
> +
> return -1;
> }

Just delete the BUG() and put a comment that /* This is impossible. */
so that reviewers know that we never return -1.

I suspect that there are some static analysis tools which might complain
about this -1 return. But those tools are pretty crap. Never change
code just to make the tools happy.

regards,
dan carpenter


\
 
 \ /
  Last update: 2020-08-21 15:33    [W:0.069 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site