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

[Greg Kurz <groug@kaod.org>]

On Tue,  7 Jan 2020 18:18:08 +0100
Cédric Le Goater <clg@kaod.org> 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>
> ---

Reviewed-by: Greg Kurz <groug@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));
> +    }
>  }
>  
>  static void pnv_pnor_write(void *opaque, hwaddr addr, uint64_t data,