From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: kieran.bingham+renesas@ideasonboard.com,
niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 16/19] media: i2c: rdacm20: Replace goto with a loop
Date: Sat, 20 Mar 2021 18:17:46 +0200 [thread overview]
Message-ID: <YFYgKgBIJbVP9KhM@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20210319164148.199192-17-jacopo+renesas@jmondi.org>
Hi Jacopo,
Thank you for the patch.
On Fri, Mar 19, 2021 at 05:41:45PM +0100, Jacopo Mondi wrote:
> During the camera module initialization the image sensor PID is read to
> verify it can correctly be identified. The current implementation is
> rather confused and uses a loop implemented with a label and a goto.
>
> Replace it with a more compact for() loop.
>
> No functional changes intended.
>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
> drivers/media/i2c/rdacm20.c | 29 +++++++++++++----------------
> 1 file changed, 13 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/i2c/rdacm20.c b/drivers/media/i2c/rdacm20.c
> index 7bdcfafa6c10..760705dd2918 100644
> --- a/drivers/media/i2c/rdacm20.c
> +++ b/drivers/media/i2c/rdacm20.c
> @@ -59,6 +59,8 @@
> */
> #define OV10635_PIXEL_RATE (44000000)
>
> +#define OV10635_PID_TIMEOUT 3
> +
> static const struct ov10635_reg {
> u16 reg;
> u8 val;
> @@ -438,7 +440,7 @@ static int rdacm20_get_fmt(struct v4l2_subdev *sd,
> static int rdacm20_init(struct v4l2_subdev *sd, unsigned int val)
> {
> struct rdacm20_device *dev = sd_to_rdacm20(sd);
> - unsigned int retry = 3;
> + unsigned int i;
> int ret;
>
> /*
> @@ -478,23 +480,18 @@ static int rdacm20_init(struct v4l2_subdev *sd, unsigned int val)
> return ret;
> usleep_range(10000, 15000);
>
> -again:
> - ret = ov10635_read16(dev, OV10635_PID);
> - if (ret < 0) {
> - if (retry--)
> - goto again;
> + for (i = 0; i < OV10635_PID_TIMEOUT; ++i) {
As commented on a previous patch, this macro is used here only, I would
have made it local.
> + ret = ov10635_read16(dev, OV10635_PID);
> + if (ret == OV10635_VERSION)
> + break;
> + else if (ret >= 0)
> + /* Sometimes we get a successful read but a wrong ID. */
> + dev_dbg(dev->dev, "OV10635 ID mismatch (%d)\n", ret);
>
> - dev_err(dev->dev, "OV10635 ID read failed (%d)\n",
> - ret);
> - return -ENXIO;
> + usleep_range(1000, 2000);
> }
> -
> - if (ret != OV10635_VERSION) {
> - if (retry--)
> - goto again;
> -
> - dev_err(dev->dev, "OV10635 ID mismatch (0x%04x)\n",
> - ret);
Blank line ?
> + if (i == OV10635_PID_TIMEOUT) {
> + dev_err(dev->dev, "OV10635 ID read failed (%d)\n", ret);
> return -ENXIO;
> }
>
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2021-03-20 16:19 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 16:41 [PATCH v3 00/19] media: gmsl: Reliability improvement Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 01/19] media: i2c: max9286: Adjust parameters indent Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 02/19] media: i2c: max9286: Rename reverse_channel_mv Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 03/19] media: i2c: max9286: Cache channel amplitude Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 04/19] media: i2c: max9286: Define high " Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 05/19] media: v4l2-subdev: De-deprecate init() subdev op Jacopo Mondi
2021-03-20 15:42 ` Laurent Pinchart
2021-03-21 20:52 ` Sakari Ailus
2021-03-22 12:51 ` Jacopo Mondi
2021-03-26 11:37 ` Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 06/19] media: gmsl: Reimplement initialization sequence Jacopo Mondi
2021-03-20 15:46 ` Laurent Pinchart
2021-03-19 16:41 ` [PATCH v3 07/19] media: i2c: max9286: Rework comments in .bound() Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 08/19] media: i2c: max9271: Check max9271_write() return Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 09/19] media: i2c: max9271: Introduce wake_up() function Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 10/19] media: i2c: rdamc21: Fix warning on u8 cast Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 11/19] media: i2c: rdacm21: Add dealy after OV490 reset Jacopo Mondi
2021-03-19 16:49 ` Kieran Bingham
2021-03-20 15:52 ` Laurent Pinchart
2021-03-26 11:22 ` Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 12/19] media: i2c: rdacm21: Fix OV10640 powerup Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 13/19] media: i2c: rdacm21: Power up OV10640 before OV490 Jacopo Mondi
2021-03-20 16:14 ` Laurent Pinchart
2021-03-26 11:07 ` Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 14/19] media: i2c: rdacm20: Enable noise immunity Jacopo Mondi
2021-03-20 16:16 ` Laurent Pinchart
2021-03-19 16:41 ` [PATCH v3 15/19] media: i2c: rdacm20: Embed 'serializer' field Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 16/19] media: i2c: rdacm20: Replace goto with a loop Jacopo Mondi
2021-03-20 16:17 ` Laurent Pinchart [this message]
2021-03-19 16:41 ` [PATCH v3 17/19] media: i2c: rdacm20: Report camera module name Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 18/19] media: i2c: rdacm20: Check return values Jacopo Mondi
2021-03-19 16:41 ` [PATCH v3 19/19] media: i2c: rdacm20: Re-work ov10635 reset Jacopo Mondi
2021-03-20 16:24 ` Laurent Pinchart
2021-03-26 11:11 ` Jacopo Mondi
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