Re: [PATCH v4 2/2] staging: android: Remove BUG from ion_system_heap.c

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On 8/21/20 8:28 AM, Tomer Samara wrote:
> Remove BUG() from ion_sytem_heap.c
> 
> 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@xxxxxxxxx>
> ---
>  drivers/staging/android/ion/ion_system_heap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
> index eac0632ab4e8..00d6154aec34 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();
> +	/* This is impossible. */
>  	return -1;
>  }

Hi,
Please explain why this is impossible.

If some caller calls order_to_index(5), it will return -1, yes?

-- 
~Randy

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