linux-kernel - Re: [PATCH] phy: brcm-sata: fix a timeout test in init

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Date:   Tue, 20 Jun 2017 13:56:35 +0530
From:   Vivek Gautam <vivek.gautam@...eaurora.org>
To:     Dan Carpenter <dan.carpenter@...cle.com>,
        Kishon Vijay Abraham I <kishon@...com>
Cc:     Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@...adcom.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        Axel Lin <axel.lin@...ics.com>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] phy: brcm-sata: fix a timeout test in init



On 06/19/2017 04:26 PM, Dan Carpenter wrote:
> We want to timeout with try set to zero so this should be a pre-op
> instead of post-op.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
>
> diff --git a/drivers/phy/broadcom/phy-brcm-sata.c b/drivers/phy/broadcom/phy-brcm-sata.c
> index ccbc3d994998..48fb016ce689 100644
> --- a/drivers/phy/broadcom/phy-brcm-sata.c
> +++ b/drivers/phy/broadcom/phy-brcm-sata.c
> @@ -329,7 +329,7 @@ static int brcm_nsp_sata_init(struct brcm_sata_port *port)
>   
>   	/* Wait for pll_seq_done bit */
>   	try = 50;
> -	while (try--) {
> +	while (--try) {

Do we want to try reading the status 50 times? If yes, won't your change
break that? It will rather run the loop 49 times.

Thanks
Vivek

>   		val = brcm_sata_phy_rd(base, BLOCK0_REG_BANK,
>   					BLOCK0_XGXSSTATUS);
>   		if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)

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