From: Aaron Ma <aaron.ma@canonical.com>
To: alexander.deucher@amd.com, christian.koenig@amd.com,
David1.Zhou@amd.com, airlied@linux.ie, daniel@ffwll.ch,
Hawking.Zhang@amd.com, xiaojie.yuan@amd.com,
Felix.Kuehling@amd.com, amd-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
aaron.ma@canonical.com
Subject: [PATCH] drm/amdgpu: Fix oops when pp_funcs is unset in ACPI event
Date: Fri, 3 Apr 2020 22:34:19 +0800 [thread overview]
Message-ID: <20200403143419.155503-1-aaron.ma@canonical.com> (raw)
On ARCTURUS and RENOIR, powerplay is not supported yet.
When plug in or unplug power jack, ACPI event will issue.
Then kernel NULL pointer BUG will be triggered.
Check for NULL pointers before calling.
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index f197f1be0969..611de69f9d48 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -89,7 +89,8 @@ void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev)
adev->pm.ac_power = true;
else
adev->pm.ac_power = false;
- if (adev->powerplay.pp_funcs->enable_bapm)
+ if (adev->powerplay.pp_funcs &&
+ adev->powerplay.pp_funcs->enable_bapm)
amdgpu_dpm_enable_bapm(adev, adev->pm.ac_power);
mutex_unlock(&adev->pm.mutex);
--
2.17.1
next reply other threads:[~2020-04-03 14:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-03 14:34 Aaron Ma [this message]
2020-04-03 20:36 ` [PATCH] drm/amdgpu: Fix oops when pp_funcs is unset in ACPI event Alex Deucher
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=20200403143419.155503-1-aaron.ma@canonical.com \
--to=aaron.ma@canonical.com \
--cc=David1.Zhou@amd.com \
--cc=Felix.Kuehling@amd.com \
--cc=Hawking.Zhang@amd.com \
--cc=airlied@linux.ie \
--cc=alexander.deucher@amd.com \
--cc=amd-gfx@lists.freedesktop.org \
--cc=christian.koenig@amd.com \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=xiaojie.yuan@amd.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).