Re: [PATCH v4 1/2] hw/block: m25p80: Don't write to flash if write is disabled

[Francisco Iglesias <frasse.iglesias@gmail.com>]

On [2020 Dec 22] Tue 14:45:19, Bin Meng wrote:
> From: Bin Meng <bin.meng@windriver.com>
> 
> When write is disabled, the write to flash should be avoided
> in flash_write8().
> 
> Fixes: 82a2499011a7 ("m25p80: Initial implementation of SPI flash device")
> Signed-off-by: Bin Meng <bin.meng@windriver.com>

Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>

> 
> ---
> 
> (no changes since v2)
> 
> Changes in v2:
> - new patch: honor write enable flag in flash write
> 
>  hw/block/m25p80.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
> index 483925f..236e1b4 100644
> --- a/hw/block/m25p80.c
> +++ b/hw/block/m25p80.c
> @@ -594,6 +594,7 @@ void flash_write8(Flash *s, uint32_t addr, uint8_t data)
>  
>      if (!s->write_enable) {
>          qemu_log_mask(LOG_GUEST_ERROR, "M25P80: write with write protect!\n");
> +        return;
>      }
>  
>      if ((prev ^ data) & data) {
> -- 
> 2.7.4
>