From: trix@redhat.com
To: patrik.r.jakobsson@gmail.com, airlied@linux.ie, daniel@ffwll.ch,
airlied@redhat.com, yakui.zhao@intel.com, alan@linux.intel.com
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Tom Rix <trix@redhat.com>
Subject: [PATCH] drm/gma500: fix error check
Date: Wed, 5 Aug 2020 13:59:11 -0700 [thread overview]
Message-ID: <20200805205911.20927-1-trix@redhat.com> (raw)
From: Tom Rix <trix@redhat.com>
Reviewing this block of code in cdv_intel_dp_init()
ret = cdv_intel_dp_aux_native_read(gma_encoder, DP_DPCD_REV, ...
cdv_intel_edp_panel_vdd_off(gma_encoder);
if (ret == 0) {
/* if this fails, presume the device is a ghost */
DRM_INFO("failed to retrieve link info, disabling eDP\n");
drm_encoder_cleanup(encoder);
cdv_intel_dp_destroy(connector);
goto err_priv;
} else {
The (ret == 0) is not strict enough.
cdv_intel_dp_aux_native_read() returns > 0 on success
otherwise it is failure.
So change to <=
Fixes: d112a8163f83 ("gma500/cdv: Add eDP support")
Signed-off-by: Tom Rix <trix@redhat.com>
---
drivers/gpu/drm/gma500/cdv_intel_dp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/gma500/cdv_intel_dp.c b/drivers/gpu/drm/gma500/cdv_intel_dp.c
index f41cbb753bb4..720a767118c9 100644
--- a/drivers/gpu/drm/gma500/cdv_intel_dp.c
+++ b/drivers/gpu/drm/gma500/cdv_intel_dp.c
@@ -2078,7 +2078,7 @@ cdv_intel_dp_init(struct drm_device *dev, struct psb_intel_mode_device *mode_dev
intel_dp->dpcd,
sizeof(intel_dp->dpcd));
cdv_intel_edp_panel_vdd_off(gma_encoder);
- if (ret == 0) {
+ if (ret <= 0) {
/* if this fails, presume the device is a ghost */
DRM_INFO("failed to retrieve link info, disabling eDP\n");
drm_encoder_cleanup(encoder);
--
2.18.1
next reply other threads:[~2020-08-05 20:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-05 20:59 trix [this message]
2020-08-19 13:41 ` [PATCH] drm/gma500: fix error check Patrik Jakobsson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200805205911.20927-1-trix@redhat.com \
--to=trix@redhat.com \
--cc=airlied@linux.ie \
--cc=airlied@redhat.com \
--cc=alan@linux.intel.com \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=patrik.r.jakobsson@gmail.com \
--cc=yakui.zhao@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).