linux-kernel - Re: [PATCH V6 10/10] scsi: ufs: qcom : Refactor phy_power

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Message-Id: <20250619135302.9192-1-aishwarya.tcv@arm.com>
Date: Thu, 19 Jun 2025 14:53:02 +0100
From: Aishwarya <aishwarya.tcv@....com>
To: quic_nitirawa@...cinc.com
Cc: James.Bottomley@...senPartnership.com,
	andersson@...nel.org,
	bvanassche@....org,
	dmitry.baryshkov@....qualcomm.com,
	kishon@...nel.org,
	konrad.dybcio@....qualcomm.com,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-phy@...ts.infradead.org,
	linux-scsi@...r.kernel.org,
	manivannan.sadhasivam@...aro.org,
	martin.petersen@...cle.com,
	neil.armstrong@...aro.org,
	quic_cang@...cinc.com,
	quic_rdwivedi@...cinc.com,
	vkoul@...nel.org
Subject: Re: [PATCH V6 10/10] scsi: ufs: qcom : Refactor phy_power_on/off calls

Hi Nitin,

When booting the kernel from next-20250619 on Arm64 Qualcomm boards
(RB5 and DB845C), we observe that the baseline bootr test fails due to
dmesg.emerg errors in our CI environment.

A full git bisect (log included below) points to this patch as the
culprit. The issue was introduced sometime from tag next-20250616 in
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git.

This issue is not present in v6.16-rc2

Here’s a sample of the failure observed on the RB5 board:
lert :   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
kern  :alert :   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
kern  :alert :   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
kern  :alert : user pgtable: 4k pages, 48-bit VAs, pgdp=0000000102c4c000
kern  :alert : [0000000000000000] pgd=0000000000000000
kern  :emerg : Internal error: Oops: 0000000096000004 [#1]  SMP
kern  :emerg : Code: a90157f3 aa0003f3 f90013f6 f9405c15 (f94002b6) 
<8>[   30.933289] <LAVA_SIGNAL_TESTCASE TEST_CASE_ID=emerg RESULT=fail UNITS=lines MEASUREMENT=2>
+ <8>[   30.943798] <LAVA_SIGNAL_ENDRUN 0_dmesg 1000325_2.4.4.1>
set +x

Git bisection log:
git bisect start
# status: waiting for both good and bad commits
# good: [9afe652958c3ee88f24df1e4a97f298afce89407] Merge tag 'x86_urgent_for_6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 9afe652958c3ee88f24df1e4a97f298afce89407
# status: waiting for bad commit, 1 good commit known
# bad: [4325743c7e209ae7845293679a4de94b969f2bef] Add linux-next specific files for 20250617
git bisect bad 4325743c7e209ae7845293679a4de94b969f2bef
# good: [436c8cbbcb18deb96100cd9f33f1efedddc31d9c] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
git bisect good 436c8cbbcb18deb96100cd9f33f1efedddc31d9c
# good: [183d224083773ca4a84a458fb608efecff19e19e] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git
git bisect good 183d224083773ca4a84a458fb608efecff19e19e
# good: [1347ff0c0e510f1a6adb78259a2a0ddfac41d258] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git
git bisect good 1347ff0c0e510f1a6adb78259a2a0ddfac41d258
# bad: [b09bd04eabb1994257f4c11d0ed25ff03517d3ec] Merge branch 'gpio/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
git bisect bad b09bd04eabb1994257f4c11d0ed25ff03517d3ec
# good: [70bc9e18653c20fbcb47184d9498ad7bd7b7d6be] Merge branch 'togreg' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git
git bisect good 70bc9e18653c20fbcb47184d9498ad7bd7b7d6be
# bad: [3a847fb85c9d47e61ad5d9d54b762a3e99a08084] Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy.git
git bisect bad 3a847fb85c9d47e61ad5d9d54b762a3e99a08084
# skip: [50355ac70d4f104e2f82bfbd0658c129027ebb37] dt-bindings: phy: Convert marvell,comphy-cp110 to DT schema
git bisect skip 50355ac70d4f104e2f82bfbd0658c129027ebb37
# good: [acc6b0d73d902d3296d8c77878a9b508c2c6a5bf] phy: qcom-qmp-ufs: Rename qmp_ufs_power_off
git bisect good acc6b0d73d902d3296d8c77878a9b508c2c6a5bf
# bad: [35b629b28afd72a14ed573f1b180dc4ab1bf7e19] dt-bindings: phy: Convert ti,dm816x-usb-phy to DT schema
git bisect bad 35b629b28afd72a14ed573f1b180dc4ab1bf7e19
# bad: [66acaf8f6b0bcc273f8356b2a77baa90b177014c] dt-bindings: phy: Convert img,pistachio-usb-phy to DT schema
git bisect bad 66acaf8f6b0bcc273f8356b2a77baa90b177014c
# bad: [f151f3a6ebe184b5f8c9abe58fe2d63f9950139b] dt-bindings: phy: Convert brcm,ns2-drd-phy to DT schema
git bisect bad f151f3a6ebe184b5f8c9abe58fe2d63f9950139b
# bad: [77d2fa54a94574f767d5fb296b6b8e011eba0c8e] scsi: ufs: qcom : Refactor phy_power_on/off calls
git bisect bad 77d2fa54a94574f767d5fb296b6b8e011eba0c8e
# good: [7f600f0e193a6638135026c3718ac296ed3f5044] phy: qcom-qmp-ufs: Remove qmp_ufs_exit() and Inline qmp_ufs_com_exit()
git bisect good 7f600f0e193a6638135026c3718ac296ed3f5044
# good: [a079b2d715340482e425ff136b55810ab8279800] phy: qcom-qmp-ufs: refactor qmp_ufs_power_off
git bisect good a079b2d715340482e425ff136b55810ab8279800
# first bad commit: [77d2fa54a94574f767d5fb296b6b8e011eba0c8e] scsi: ufs: qcom : Refactor phy_power_on/off calls

Thanks,
Aishwarya