[6/9] drm/bridge: tc358767: Simplify error check in tc_aux_linx_setup()
diff mbox series

Message ID 20190226193609.9862-7-andrew.smirnov@gmail.com
State New
Headers show
Series
  • tc358767 driver improvements
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Commit Message

Andrey Smirnov Feb. 26, 2019, 7:36 p.m. UTC
Tc_poll_timeout() can only return -ETIMEDOUT, so checking for other
errors is not necessary. Drop it. No functional change intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/gpu/drm/bridge/tc358767.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Comments

Laurent Pinchart March 4, 2019, 12:33 p.m. UTC | #1
Hi Andrey,

Thank you for the patch.

On Tue, Feb 26, 2019 at 11:36:06AM -0800, Andrey Smirnov wrote:
> Tc_poll_timeout() can only return -ETIMEDOUT, so checking for other
> errors is not necessary. Drop it. No functional change intended.

Is that true given patch 1/9 in this series ? regmap_read_poll_timeout()
can also return an error from regmap_read().

> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> Cc: Archit Taneja <architt@codeaurora.org>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> Cc: Chris Healy <cphealy@gmail.com>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: dri-devel@lists.freedesktop.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  drivers/gpu/drm/bridge/tc358767.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
> index ea30cec4a0c3..54ff95f66e30 100644
> --- a/drivers/gpu/drm/bridge/tc358767.c
> +++ b/drivers/gpu/drm/bridge/tc358767.c
> @@ -569,11 +569,10 @@ static int tc_aux_link_setup(struct tc_data *tc)
>  
>  	ret = tc_poll_timeout(tc->regmap, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 1,
>  			      1000);
> -	if (ret == -ETIMEDOUT) {
> +	if (ret) {
>  		dev_err(tc->dev, "Timeout waiting for PHY to become ready");
>  		return ret;
> -	} else if (ret)
> -		goto err;
> +	}
>  
>  	/* Setup AUX link */
>  	tc_write(DP0_AUXCFG1, AUX_RX_FILTER_EN |
Andrey Smirnov March 11, 2019, 6:32 p.m. UTC | #2
On Mon, Mar 4, 2019 at 4:33 AM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
>
> Hi Andrey,
>
> Thank you for the patch.
>
> On Tue, Feb 26, 2019 at 11:36:06AM -0800, Andrey Smirnov wrote:
> > Tc_poll_timeout() can only return -ETIMEDOUT, so checking for other
> > errors is not necessary. Drop it. No functional change intended.
>
> Is that true given patch 1/9 in this series ? regmap_read_poll_timeout()
> can also return an error from regmap_read().
>

Ugh, I misread "?:" in regmap_read_poll_timeout() code as "?", this
patch is incorrect. Sorry about that, will drop in v2.

Thanks,
Andrey Smirnov

Patch
diff mbox series

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index ea30cec4a0c3..54ff95f66e30 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -569,11 +569,10 @@  static int tc_aux_link_setup(struct tc_data *tc)
 
 	ret = tc_poll_timeout(tc->regmap, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 1,
 			      1000);
-	if (ret == -ETIMEDOUT) {
+	if (ret) {
 		dev_err(tc->dev, "Timeout waiting for PHY to become ready");
 		return ret;
-	} else if (ret)
-		goto err;
+	}
 
 	/* Setup AUX link */
 	tc_write(DP0_AUXCFG1, AUX_RX_FILTER_EN |