Re: [PATCH 1/2] ppc/pnv: check return value of blk_pwrite()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 1/7/20 6:18 PM, Cédric Le Goater wrote:
> When updating the PNOR file contents, we should check for a possible
> failure of blk_pwrite().
> 
> Fixes Coverity issue CID 1412228.
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>   hw/ppc/pnv_pnor.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/ppc/pnv_pnor.c b/hw/ppc/pnv_pnor.c
> index bfb1e92b0392..0e86ae2feae6 100644
> --- a/hw/ppc/pnv_pnor.c
> +++ b/hw/ppc/pnv_pnor.c
> @@ -33,6 +33,7 @@ static uint64_t pnv_pnor_read(void *opaque, hwaddr addr, unsigned size)
>   static void pnv_pnor_update(PnvPnor *s, int offset, int size)
>   {
>       int offset_end;
> +    int ret;
>   
>       if (s->blk) {
>           return;
> @@ -42,8 +43,11 @@ static void pnv_pnor_update(PnvPnor *s, int offset, int size)
>       offset = QEMU_ALIGN_DOWN(offset, BDRV_SECTOR_SIZE);
>       offset_end = QEMU_ALIGN_UP(offset_end, BDRV_SECTOR_SIZE);
>   
> -    blk_pwrite(s->blk, offset, s->storage + offset,
> -               offset_end - offset, 0);
> +    ret = blk_pwrite(s->blk, offset, s->storage + offset,
> +                     offset_end - offset, 0);
> +    if (ret < 0) {
> +        error_report("Could not update PNOR: %s", strerror(-ret));

Can you report the failed offset too please?

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> +    }
>   }
>   
>   static void pnv_pnor_write(void *opaque, hwaddr addr, uint64_t data,
>