* [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer()
@ 2021-09-24 15:26 Tim Gardner
2021-09-24 16:03 ` Tim Gardner
2021-10-11 10:07 ` Robert Foss
0 siblings, 2 replies; 4+ messages in thread
From: Tim Gardner @ 2021-09-24 15:26 UTC (permalink / raw)
To: dri-devel
Cc: tim.gardner, William Breathitt Gray, Syed Nayyar Waris,
Andrzej Hajda, Neil Armstrong, Robert Foss, Laurent Pinchart,
Jonas Karlman, Jernej Skrabec, David Airlie, Daniel Vetter,
linux-iio, linux-kernel
Coverity complains of an unused return code:
CID 120459 (#1 of 1): Unchecked return value (CHECKED_RETURN)
7. check_return: Calling regmap_bulk_write without checking return value (as is
done elsewhere 199 out of 291 times).
204 regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
205 ARRAY_SIZE(addr_len));
While I was at it I noticed 2 other places where return codes were not being
used, or used incorrectly (which is a real bug).
Fix these errors by correctly using the returned error codes.
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Syed Nayyar Waris <syednwaris@gmail.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: linux-iio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---
drivers/gpu/drm/bridge/parade-ps8640.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 3aaa90913bf8..591da962970a 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -201,8 +201,12 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :
((len - 1) & SWAUX_LENGTH_MASK);
- regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
+ ret = regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
ARRAY_SIZE(addr_len));
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to bulk write ADDR_7_0: %d\n", ret);
+ return ret;
+ }
if (len && (request == DP_AUX_NATIVE_WRITE ||
request == DP_AUX_I2C_WRITE)) {
@@ -218,13 +222,17 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
}
}
- regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
+ ret = regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to write SEND: %d\n", ret);
+ return ret;
+ }
/* Zero delay loop because i2c transactions are slow already */
regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
!(data & SWAUX_SEND), 0, 50 * 1000);
- regmap_read(map, PAGE0_SWAUX_STATUS, &data);
+ ret = regmap_read(map, PAGE0_SWAUX_STATUS, &data);
if (ret) {
DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n",
ret);
--
2.33.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer()
2021-09-24 15:26 [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer() Tim Gardner
@ 2021-09-24 16:03 ` Tim Gardner
2021-09-25 0:45 ` William Breathitt Gray
2021-10-11 10:07 ` Robert Foss
1 sibling, 1 reply; 4+ messages in thread
From: Tim Gardner @ 2021-09-24 16:03 UTC (permalink / raw)
To: dri-devel
Cc: William Breathitt Gray, Syed Nayyar Waris, Andrzej Hajda,
Neil Armstrong, Robert Foss, Laurent Pinchart, Jonas Karlman,
Jernej Skrabec, David Airlie, Daniel Vetter, linux-iio,
linux-kernel
On 9/24/21 9:26 AM, Tim Gardner wrote:
> Coverity complains of an unused return code:
>
> CID 120459 (#1 of 1): Unchecked return value (CHECKED_RETURN)
> 7. check_return: Calling regmap_bulk_write without checking return value (as is
> done elsewhere 199 out of 291 times).
> 204 regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> 205 ARRAY_SIZE(addr_len));
>
> While I was at it I noticed 2 other places where return codes were not being
> used, or used incorrectly (which is a real bug).
>
> Fix these errors by correctly using the returned error codes.
>
> Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
> Cc: Syed Nayyar Waris <syednwaris@gmail.com>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> Cc: Robert Foss <robert.foss@linaro.org>
> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> Cc: Jonas Karlman <jonas@kwiboo.se>
> Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: linux-iio@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
> ---
> drivers/gpu/drm/bridge/parade-ps8640.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
> index 3aaa90913bf8..591da962970a 100644
> --- a/drivers/gpu/drm/bridge/parade-ps8640.c
> +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> @@ -201,8 +201,12 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
> addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :
> ((len - 1) & SWAUX_LENGTH_MASK);
>
> - regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> + ret = regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> ARRAY_SIZE(addr_len));
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to bulk write ADDR_7_0: %d\n", ret);
> + return ret;
> + }
>
> if (len && (request == DP_AUX_NATIVE_WRITE ||
> request == DP_AUX_I2C_WRITE)) {
> @@ -218,13 +222,17 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
> }
> }
>
> - regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
> + ret = regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to write SEND: %d\n", ret);
> + return ret;
> + }
>
> /* Zero delay loop because i2c transactions are slow already */
> regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
> !(data & SWAUX_SEND), 0, 50 * 1000);
>
> - regmap_read(map, PAGE0_SWAUX_STATUS, &data);
> + ret = regmap_read(map, PAGE0_SWAUX_STATUS, &data);
> if (ret) {
> DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n",
> ret);
>
I forgot to mention this patch is for linux-next next-20210924.
-----------
Tim Gardner
Canonical, Inc
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer()
2021-09-24 16:03 ` Tim Gardner
@ 2021-09-25 0:45 ` William Breathitt Gray
0 siblings, 0 replies; 4+ messages in thread
From: William Breathitt Gray @ 2021-09-25 0:45 UTC (permalink / raw)
To: Tim Gardner
Cc: dri-devel, Syed Nayyar Waris, Andrzej Hajda, Neil Armstrong,
Robert Foss, Laurent Pinchart, Jonas Karlman, Jernej Skrabec,
David Airlie, Daniel Vetter, linux-iio, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 3582 bytes --]
On Fri, Sep 24, 2021 at 10:03:27AM -0600, Tim Gardner wrote:
>
>
> On 9/24/21 9:26 AM, Tim Gardner wrote:
> > Coverity complains of an unused return code:
> >
> > CID 120459 (#1 of 1): Unchecked return value (CHECKED_RETURN)
> > 7. check_return: Calling regmap_bulk_write without checking return value (as is
> > done elsewhere 199 out of 291 times).
> > 204 regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> > 205 ARRAY_SIZE(addr_len));
> >
> > While I was at it I noticed 2 other places where return codes were not being
> > used, or used incorrectly (which is a real bug).
> >
> > Fix these errors by correctly using the returned error codes.
> >
> > Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
> > Cc: Syed Nayyar Waris <syednwaris@gmail.com>
> > Cc: Andrzej Hajda <a.hajda@samsung.com>
> > Cc: Neil Armstrong <narmstrong@baylibre.com>
> > Cc: Robert Foss <robert.foss@linaro.org>
> > Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> > Cc: Jonas Karlman <jonas@kwiboo.se>
> > Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
> > Cc: David Airlie <airlied@linux.ie>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > Cc: linux-iio@vger.kernel.org
> > Cc: linux-kernel@vger.kernel.org
> > Cc: dri-devel@lists.freedesktop.org
> > Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
> > ---
> > drivers/gpu/drm/bridge/parade-ps8640.c | 14 +++++++++++---
> > 1 file changed, 11 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
> > index 3aaa90913bf8..591da962970a 100644
> > --- a/drivers/gpu/drm/bridge/parade-ps8640.c
> > +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> > @@ -201,8 +201,12 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
> > addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :
> > ((len - 1) & SWAUX_LENGTH_MASK);
> >
> > - regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> > + ret = regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> > ARRAY_SIZE(addr_len));
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "failed to bulk write ADDR_7_0: %d\n", ret);
> > + return ret;
> > + }
> >
> > if (len && (request == DP_AUX_NATIVE_WRITE ||
> > request == DP_AUX_I2C_WRITE)) {
> > @@ -218,13 +222,17 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
> > }
> > }
> >
> > - regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
> > + ret = regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "failed to write SEND: %d\n", ret);
> > + return ret;
> > + }
> >
> > /* Zero delay loop because i2c transactions are slow already */
> > regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
> > !(data & SWAUX_SEND), 0, 50 * 1000);
> >
> > - regmap_read(map, PAGE0_SWAUX_STATUS, &data);
> > + ret = regmap_read(map, PAGE0_SWAUX_STATUS, &data);
> > if (ret) {
> > DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n",
> > ret);
> >
>
> I forgot to mention this patch is for linux-next next-20210924.
>
> -----------
> Tim Gardner
> Canonical, Inc
Hi Tim,
For future patches, the git format-patch command has a useful option
'--base'. It will allow you to provide the base tree information for
users and maintainers so that they know where to apply the patch:
https://git-scm.com/docs/git-format-patch#_base_tree_information
Sincerely,
William Breathitt Gray
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer()
2021-09-24 15:26 [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer() Tim Gardner
2021-09-24 16:03 ` Tim Gardner
@ 2021-10-11 10:07 ` Robert Foss
1 sibling, 0 replies; 4+ messages in thread
From: Robert Foss @ 2021-10-11 10:07 UTC (permalink / raw)
To: Tim Gardner
Cc: dri-devel, William Breathitt Gray, Syed Nayyar Waris,
Andrzej Hajda, Neil Armstrong, Laurent Pinchart, Jonas Karlman,
Jernej Skrabec, David Airlie, Daniel Vetter, linux-iio,
linux-kernel
Hey Tim,
Thanks for submitting this.
I'm seeing some checkpatch --strict warnings. Could you fix them and
resubmit the series?
On Fri, 24 Sept 2021 at 17:26, Tim Gardner <tim.gardner@canonical.com> wrote:
>
> Coverity complains of an unused return code:
>
> CID 120459 (#1 of 1): Unchecked return value (CHECKED_RETURN)
> 7. check_return: Calling regmap_bulk_write without checking return value (as is
Checkpatch is unhappy about the length of this line.
> done elsewhere 199 out of 291 times).
> 204 regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> 205 ARRAY_SIZE(addr_len));
>
> While I was at it I noticed 2 other places where return codes were not being
> used, or used incorrectly (which is a real bug).
>
> Fix these errors by correctly using the returned error codes.
>
> Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
> Cc: Syed Nayyar Waris <syednwaris@gmail.com>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> Cc: Robert Foss <robert.foss@linaro.org>
> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> Cc: Jonas Karlman <jonas@kwiboo.se>
> Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: linux-iio@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
> ---
> drivers/gpu/drm/bridge/parade-ps8640.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
> index 3aaa90913bf8..591da962970a 100644
> --- a/drivers/gpu/drm/bridge/parade-ps8640.c
> +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> @@ -201,8 +201,12 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
> addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :
> ((len - 1) & SWAUX_LENGTH_MASK);
>
> - regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> + ret = regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
> ARRAY_SIZE(addr_len));
Align to open parenthesis.
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to bulk write ADDR_7_0: %d\n", ret);
> + return ret;
> + }
>
> if (len && (request == DP_AUX_NATIVE_WRITE ||
> request == DP_AUX_I2C_WRITE)) {
> @@ -218,13 +222,17 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
> }
> }
>
> - regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
> + ret = regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to write SEND: %d\n", ret);
> + return ret;
> + }
>
> /* Zero delay loop because i2c transactions are slow already */
> regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
> !(data & SWAUX_SEND), 0, 50 * 1000);
>
> - regmap_read(map, PAGE0_SWAUX_STATUS, &data);
> + ret = regmap_read(map, PAGE0_SWAUX_STATUS, &data);
> if (ret) {
> DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n",
> ret);
> --
> 2.33.0
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-09-24 15:26 [PATCH] drm/bridge: parade-ps8640: check return values in ps8640_aux_transfer() Tim Gardner
2021-09-24 16:03 ` Tim Gardner
2021-09-25 0:45 ` William Breathitt Gray
2021-10-11 10:07 ` Robert Foss
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