Re: [PATCH 2/2] mwifiex: pcie: compatible with wifi-only image while extract wifi-part fw

[Brian Norris <briannorris@chromium.org>]

Hi,

Two nitpicks below:

On Mon, Jul 31, 2017 at 01:07:27PM +0000, Xinming Hu wrote:
> From: Xinming Hu <huxm@marvell.com>
> 
> Sometimes, we might using wifi-only firmware with a combo firmware name,
> in this case, do not need to filter bluetooth part from header.
> 
> Signed-off-by: Xinming Hu <huxm@marvell.com>
> Signed-off-by: Cathy Luo <cluo@marvell.com>
> ---
>  drivers/net/wireless/marvell/mwifiex/pcie.c | 26 +++++++++++++++++++-------
>  1 file changed, 19 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
> index 3da1eeb..dc4e054 100644
> --- a/drivers/net/wireless/marvell/mwifiex/pcie.c
> +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
> @@ -1985,7 +1985,8 @@ static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter,
>   * (3) wifi image.
>   *
>   * This function bypass the header and bluetooth part, return
> - * the offset of tail wifi-only part.
> + * the offset of tail wifi-only part. if the image is already wifi-only,

Sentences start with capital letters (i.e., "If the image ...").

> + * that is start with CMD1, return 0.
>   */
>  
>  static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
> @@ -1993,7 +1994,7 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
>  	const struct mwifiex_fw_data *fwdata;
>  	u32 offset = 0, data_len, dnld_cmd;
>  	int ret = 0;
> -	bool cmd7_before = false;
> +	bool cmd7_before = false, first_cmd = false;
>  
>  	while (1) {
>  		/* Check for integer and buffer overflow */
> @@ -2014,20 +2015,29 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
>  
>  		switch (dnld_cmd) {
>  		case MWIFIEX_FW_DNLD_CMD_1:
> -			if (!cmd7_before) {
> -				mwifiex_dbg(adapter, ERROR,
> -					    "no cmd7 before cmd1!\n");
> +			if (offset + data_len < data_len) {
> +				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
>  				ret = -1;
>  				goto done;
>  			}
> -			if (offset + data_len < data_len) {
> -				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
> +
> +			/* Image start with cmd1, already wifi-only firmware*/

You need a space before closing the comment. i.e.:

			/* Image starts with cmd1; already wifi-only firmware */

Otherwise, I think both of these look fine:

Reviewed-by: Brian Norris <briannorris@chromium.org>

> +			if (!first_cmd) {
> +				mwifiex_dbg(adapter, MSG,
> +					    "input wifi-only firmware\n");
> +				return 0;
> +			}
> +
> +			if (!cmd7_before) {
> +				mwifiex_dbg(adapter, ERROR,
> +					    "no cmd7 before cmd1!\n");
>  				ret = -1;
>  				goto done;
>  			}
>  			offset += data_len;
>  			break;
>  		case MWIFIEX_FW_DNLD_CMD_5:
> +			first_cmd = true;
>  			/* Check for integer overflow */
>  			if (offset + data_len < data_len) {
>  				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
> @@ -2037,6 +2047,7 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
>  			offset += data_len;
>  			break;
>  		case MWIFIEX_FW_DNLD_CMD_6:
> +			first_cmd = true;
>  			/* Check for integer overflow */
>  			if (offset + data_len < data_len) {
>  				mwifiex_dbg(adapter, ERROR, "bad FW parse\n");
> @@ -2053,6 +2064,7 @@ static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter,
>  			}
>  			goto done;
>  		case MWIFIEX_FW_DNLD_CMD_7:
> +			first_cmd = true;
>  			cmd7_before = true;
>  			break;
>  		default:
> -- 
> 1.9.1
>