[Skiboot] [PATCH V2 1/4] libflash/mbox-flash: Minor fixups before V2

[Cyril Bur]

On Wed, 2017-05-24 at 16:37 +1000, Suraj Jitindar Singh wrote:
> From: Cyril Bur <cyril.bur at au1.ibm.com>
> 
> - Warn if flushing with closed write window.
> - Call msg_free_memory() in mbox_flash_init() before a successful
>   return. No leak is present as the current allocation theme is from
>   static memory. However as this is likely to change in the future,
>   best to ensure that msg_free_memory() is called after every
>   allocation.
> - Fix bug where len argument may be incorrect in mark dirty command.
> 
> Signed-off-by: Cyril Bur <cyril.bur at au1.ibm.com>
> Signed-off-by: Suraj Jitindar Singh <sjitindarsingh at gmail.com>

Acked-by: Cyril Bur <cyri.bur at au1.ibm.com>

> 
> ---
> 
> V1 -> V2:
> 
> - Fix bug where len argument may be incorrect in mark dirty command.
> ---
>  libflash/mbox-flash.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/libflash/mbox-flash.c b/libflash/mbox-flash.c
> index 7bf731d..996e471 100644
> --- a/libflash/mbox-flash.c
> +++ b/libflash/mbox-flash.c
> @@ -228,14 +228,18 @@ static int lpc_window_write(struct mbox_flash_data *mbox_flash, uint32_t pos,
>  static int mbox_flash_flush(struct mbox_flash_data *mbox_flash, uint64_t pos,
>  		uint64_t len)
>  {
> +	uint32_t start = ALIGN_DOWN(pos, 1 << mbox_flash->shift);
>  	struct bmc_mbox_msg *msg;
>  	int rc;
>  
> +	if (!mbox_flash->write.open)
> +		prlog(PR_WARNING, "Attempting to flush without an open write window\n");
> +
>  	msg = msg_alloc(mbox_flash, MBOX_C_WRITE_FLUSH);
>  	if (!msg)
>  		return FLASH_ERR_MALLOC_FAILED;
>  	msg_put_u16(msg, 0, pos >> mbox_flash->shift);
> -	msg_put_u32(msg, 2, len);
> +	msg_put_u32(msg, 2, pos + len - start);
>  
>  	rc = msg_send(mbox_flash, msg);
>  	if (rc) {
> @@ -550,6 +554,8 @@ int mbox_flash_init(struct blocklevel_device **bl)
>  		goto out_msg;
>  	}
>  
> +	msg_free_memory(msg);
> +
>  	mbox_flash->bl.keep_alive = 0;
>  	mbox_flash->bl.read = &mbox_flash_read;
>  	mbox_flash->bl.write = &mbox_flash_write;