This is a note to let you know that I've just added the patch titled
drm/msm/dp: fix IRQ lifetime
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-dp-fix-irq-lifetime.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a79343dcaba4b11adb57350e0b6426906a9b658e Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Tue, 13 Sep 2022 10:53:15 +0200
Subject: drm/msm/dp: fix IRQ lifetime
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
commit a79343dcaba4b11adb57350e0b6426906a9b658e upstream.
Device-managed resources allocated post component bind must be tied to
the lifetime of the aggregate DRM device or they will not necessarily be
released when binding of the aggregate device is deferred.
This is specifically true for the DP IRQ, which will otherwise remain
requested so that the next bind attempt fails when requesting the IRQ a
second time.
Since commit c3bf8e21b38a ("drm/msm/dp: Add eDP support via aux_bus")
this can happen when the aux-bus panel driver has not yet been loaded so
that probe is deferred.
Fix this by tying the device-managed lifetime of the DP IRQ to the DRM
device so that it is released when bind fails.
Fixes: c943b4948b58 ("drm/msm/dp: add displayPort driver support")
Cc: stable@xxxxxxxxxxxxxxx # 5.10
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Tested-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
Reviewed-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/502679/
Link: https://lore.kernel.org/r/20220913085320.8577-6-johan+linaro@xxxxxxxxxx
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/dp/dp_display.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1229,7 +1229,7 @@ int dp_display_request_irq(struct msm_dp
return -EINVAL;
}
- rc = devm_request_irq(&dp->pdev->dev, dp->irq,
+ rc = devm_request_irq(dp_display->drm_dev->dev, dp->irq,
dp_display_irq_handler,
IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
if (rc < 0) {
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-5.15/drm-msm-dsi-fix-memory-corruption-with-too-many-bridges.patch
queue-5.15/drm-msm-hdmi-fix-memory-corruption-with-too-many-bridges.patch
queue-5.15/drm-msm-dp-fix-irq-lifetime.patch
