[PATCH v2] powerpc/fadump: reset dump area size if fadump memory reserve fails

[Sourabh Jain]

Hello Michael,

Are there any reviews or comments on this fix?

Thanks,
Sourabh Jain

On 04/07/23 10:37, Sourabh Jain wrote:
> In case fadump_reserve_mem() fails to reserve memory, the
> reserve_dump_area_size variable will retain the reserve area size. This
> will lead to /sys/kernel/fadump/mem_reserved node displaying an incorrect
> memory reserved by fadump.
>
> To fix this problem, reserve dump area size variable is set to 0 if fadump
> failed to reserve memory.
>
> Fixes: 8255da95e545 ("powerpc/fadump: release all the memory above boot memory size")
> Signed-off-by: Sourabh Jain <sourabhjain at linux.ibm.com>
> Acked-by: Mahesh Salgaonkar <mahesh at linux.ibm.com>
> ---
> Chnages form V1:
> * Reset the dump area size within the error_out path to cover more
>    failure cases. Furthermore, the commit description has been modified
>    accordingly.
> ---
>   arch/powerpc/kernel/fadump.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
> index f3166acab09b..5a07d0f9c7f0 100644
> --- a/arch/powerpc/kernel/fadump.c
> +++ b/arch/powerpc/kernel/fadump.c
> @@ -654,6 +654,7 @@ int __init fadump_reserve_mem(void)
>   	return ret;
>   error_out:
>   	fw_dump.fadump_enabled = 0;
> +	fw_dump.reserve_dump_area_size = 0;
>   	return 0;
>   }
>