Re: [PATCH v3 4/5] net: rnpgbe: Add basic mbx_fw support

[Yibo Dong]

On Tue, Aug 12, 2025 at 05:14:15PM +0100, Vadim Fedorenko wrote:
> On 12/08/2025 10:39, Dong Yibo wrote:
> > Initialize basic mbx_fw ops, such as get_capability, reset phy
> > and so on.
> > 
> > Signed-off-by: Dong Yibo <dong100@xxxxxxxxx>
> > +static int mucse_fw_send_cmd_wait(struct mucse_hw *hw,
> > +				  struct mbx_fw_cmd_req *req,
> > +				  struct mbx_fw_cmd_reply *reply)
> > +{
> > +	int len = le16_to_cpu(req->datalen) + MBX_REQ_HDR_LEN;
> > +	int retry_cnt = 3;
> > +	int err;
> > +
> > +	err = mutex_lock_interruptible(&hw->mbx.lock);
> > +	if (err)
> > +		return err;
> > +	err = hw->mbx.ops->write_posted(hw, (u32 *)req,
> > +					L_WD(len));
> > +	if (err) {> +		mutex_unlock(&hw->mbx.lock);
> > +		return err;
> > +	}
> 
> it might look a bit cleaner if you add error label and have unlock code
> once in the end of the function...
> 

If it is more cleaner bellow?

static int mucse_fw_send_cmd_wait(struct mucse_hw *hw,
                                  struct mbx_fw_cmd_req *req,
                                  struct mbx_fw_cmd_reply *reply)
{
        int len = le16_to_cpu(req->datalen) + MBX_REQ_HDR_LEN;
        int retry_cnt = 3;
        int err;

        err = mutex_lock_interruptible(&hw->mbx.lock);
        if (err)
                return err;
        err = hw->mbx.ops->write_posted(hw, (u32 *)req,
                                        L_WD(len));
        if (err)
                goto quit;
        do {
                err = hw->mbx.ops->read_posted(hw, (u32 *)reply,
                                               L_WD(sizeof(*reply)));
                if (err)
                        goto quit;
        } while (--retry_cnt >= 0 && reply->opcode != req->opcode);

        mutex_unlock(&hw->mbx.lock);
        if (retry_cnt < 0)
                return -ETIMEDOUT;
        if (reply->error_code)
                return -EIO;
        return 0;
quit:
        mutex_unlock(&hw->mbx.lock);
        return err;
}