This is a note to let you know that I've just added the patch titled
drm/ast: Use msleep instead of mdelay for edid read
to the 6.6-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-ast-use-msleep-instead-of-mdelay-for-edid-read.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From [email protected] Mon Sep 29 17:51:18
>2025
From: Sasha Levin <[email protected]>
Date: Mon, 29 Sep 2025 11:50:10 -0400
Subject: drm/ast: Use msleep instead of mdelay for edid read
To: [email protected]
Cc: Nirmoy Das <[email protected]>, Thomas Zimmermann <[email protected]>,
[email protected], KuoHsiang Chou <[email protected]>, Dave Airlie
<[email protected]>, Jocelyn Falempe <[email protected]>,
[email protected], Sasha Levin <[email protected]>
Message-ID: <[email protected]>
From: Nirmoy Das <[email protected]>
[ Upstream commit c7c31f8dc54aa3c9b2c994b5f1ff7e740a654e97 ]
The busy-waiting in `mdelay()` can cause CPU stalls and kernel timeouts
during boot.
Signed-off-by: Nirmoy Das <[email protected]>
Reviewed-by: Thomas Zimmermann <[email protected]>
Tested-by: Carol L Soto [email protected]<mailto:[email protected]>
Fixes: 594e9c04b586 ("drm/ast: Create the driver for ASPEED proprietory
Display-Port")
Cc: KuoHsiang Chou <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: Jocelyn Falempe <[email protected]>
Cc: [email protected]
Cc: <[email protected]> # v5.19+
Signed-off-by: Thomas Zimmermann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Applied change to ast_astdp_read_edid() instead of
ast_astdp_read_edid_block() ]
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/ast/ast_dp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/ast/ast_dp.c
+++ b/drivers/gpu/drm/ast/ast_dp.c
@@ -62,7 +62,7 @@ int ast_astdp_read_edid(struct drm_devic
* of right-click of mouse.
* 2. The Delays are often longer a lot when system
resume from S3/S4.
*/
- mdelay(j+1);
+ msleep(j + 1);
if (!(ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT,
0xD1,
ASTDP_MCU_FW_EXECUTING)
&&
Patches currently in stable-queue which might be from [email protected] are
queue-6.6/smb-client-fix-wrong-index-reference-in-smb2_compoun.patch
queue-6.6/gpiolib-extend-software-node-support-to-support-secondary-software-nodes.patch
queue-6.6/net-dsa-lantiq_gswip-suppress-einval-errors-for-brid.patch
queue-6.6/scsi-ufs-mcq-fix-memory-allocation-checks-for-sqe-an.patch
queue-6.6/hid-multitouch-specify-that-apple-touch-bar-is-direc.patch
queue-6.6/can-mcba_usb-populate-ndo_change_mtu-to-prevent-buff.patch
queue-6.6/hid-multitouch-take-cls-maxcontacts-into-account-for.patch
queue-6.6/hid-multitouch-get-the-contact-id-from-hid_dg_transd.patch
queue-6.6/alsa-usb-audio-avoid-multiple-assignments-in-mixer_q.patch
queue-6.6/cpufreq-initialize-cpufreq-based-invariance-before-s.patch
queue-6.6/ethernet-rvu-af-remove-slash-from-the-driver-name.patch
queue-6.6/bluetooth-hci_sync-fix-hci_resume_advertising_sync.patch
queue-6.6/alsa-usb-audio-fix-block-comments-in-mixer_quirks.patch
queue-6.6/alsa-usb-audio-fix-build-with-config_input-n.patch
queue-6.6/drm-ast-use-msleep-instead-of-mdelay-for-edid-read.patch
queue-6.6/smb-server-don-t-use-delayed_work-for-post_recv_cred.patch
queue-6.6/drm-gma500-fix-null-dereference-in-hdmi-teardown.patch
queue-6.6/s390-cpum_cf-fix-uninitialized-warning-after-backport-of-ce971233242b.patch
queue-6.6/xfrm-xfrm_alloc_spi-shouldn-t-use-0-as-spi.patch
queue-6.6/mm-folio_may_be_lru_cached-unless-folio_test_large.patch
queue-6.6/i40e-increase-max-descriptors-for-xl710.patch
queue-6.6/can-etas_es58x-populate-ndo_change_mtu-to-prevent-bu.patch
queue-6.6/alsa-usb-audio-remove-unneeded-wmb-in-mixer_quirks.patch
queue-6.6/selftests-fib_nexthops-fix-creation-of-non-fdb-nexth.patch
queue-6.6/alsa-usb-audio-move-mixer_quirks-min_mute-into-commo.patch
queue-6.6/mm-gup-revert-mm-gup-fix-infinite-loop-within-__get_.patch
queue-6.6/hid-multitouch-support-getting-the-tip-state-from-hi.patch
queue-6.6/bpf-reject-bpf_timer-for-preempt_rt.patch
queue-6.6/alsa-usb-audio-add-mute-tlv-for-playback-volumes-on-.patch
queue-6.6/mm-gup-check-ref_count-instead-of-lru-before-migrati.patch
queue-6.6/can-hi311x-populate-ndo_change_mtu-to-prevent-buffer.patch
queue-6.6/alsa-usb-audio-simplify-null-comparison-in-mixer_qui.patch
queue-6.6/can-peak_usb-fix-shift-out-of-bounds-issue.patch
queue-6.6/i40e-add-validation-for-ring_len-param.patch
queue-6.6/net-allow-alloc_skb_with_frags-to-use-max_skb_frags.patch
queue-6.6/arm-dts-kirkwood-fix-sound-dai-cells-for-openrd-clie.patch
queue-6.6/firewire-core-fix-overlooked-update-of-subsystem-abi.patch
queue-6.6/net-dsa-lantiq_gswip-do-also-enable-or-disable-cpu-p.patch
queue-6.6/bluetooth-hci_event-fix-uaf-in-hci_acl_create_conn_s.patch
queue-6.6/alsa-usb-audio-convert-comma-to-semicolon.patch
queue-6.6/ib-mlx5-fix-obj_type-mismatch-for-srq-event-subscrip.patch
queue-6.6/can-rcar_can-rcar_can_resume-fix-s2ram-with-psci.patch
queue-6.6/net-dsa-lantiq_gswip-move-gswip_add_single_port_br-c.patch
queue-6.6/i2c-designware-add-quirk-for-intel-xe.patch
queue-6.6/alsa-usb-audio-add-dsd-support-for-comtrue-usb-audio.patch
queue-6.6/arm64-dts-imx8mp-correct-thermal-sensor-index.patch
queue-6.6/mmc-sdhci-cadence-add-mobileye-eyeq-support.patch
queue-6.6/nexthop-forbid-fdb-status-change-while-nexthop-is-in.patch
queue-6.6/alsa-usb-audio-add-mixer-quirk-for-sony-dualsense-ps.patch
queue-6.6/mm-gup-local-lru_add_drain-to-avoid-lru_add_drain_al.patch
queue-6.6/futex-prevent-use-after-free-during-requeue-pi.patch
queue-6.6/usb-core-add-0x-prefix-to-quirks-debug-output.patch
queue-6.6/bnxt_en-correct-offset-handling-for-ipv6-destination.patch
queue-6.6/mm-add-folio_expected_ref_count-for-reference-count-.patch
queue-6.6/wifi-virt_wifi-fix-page-fault-on-connect.patch
queue-6.6/alsa-usb-audio-drop-unnecessary-parentheses-in-mixer.patch
queue-6.6/vhost-take-a-reference-on-the-task-in-struct-vhost_t.patch
queue-6.6/can-sun4i_can-populate-ndo_change_mtu-to-prevent-buf.patch
queue-6.6/octeontx2-pf-fix-potential-use-after-free-in-otx2_tc.patch
