Re: next-20250620: Qualcomm Dragonboard 845c Internal error Oops at ufs_qcom_setup_clocks

[Nitin Rawat]

On 6/22/2025 2:22 PM, Naresh Kamboju wrote:
> On Sat, 21 Jun 2025 at 22:45, Nitin Rawat <quic_nitirawa@xxxxxxxxxxx> wrote:
> > On 6/21/2025 1:40 PM, Naresh Kamboju wrote:
> > > Regressions noticed on the Qualcomm Dragonboard 845c device while booting the
> > > Linux next tags from next-20250616..next-20250620 the following kernel oops
> > > noticed and boot failed.
> > >
> > > Regressions found on Thundercomm Dragonboard 845c (DT)
> > > - Boot
> > >
> > > Regression Analysis:
> > > - New regression? Yes
> > > - Reproducibility? Yes
> > >
> > > First seen on the next-20250616
> > > Good: next-20250613
> > > Bad:  next-20250616
> > >
> > > Boot regression: Qualcomm Dragonboard 845c Internal error Oops at
> > > ufs_qcom_setup_clocks
> > >
> > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> >
> >
> > Hi Naresh,
> >
> > Thanks for testing and reporting this issue. Can you please
> > test with the attached fix and let me know if it helps.
>
> The attached patch applied on top of the Linux next and
> boot test pass and also LTP smoke runs smooth.

Thank you, Naresh, for testing the fix. I have sent the patch for
review.

Thanks,
Nitin

> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> Tested-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
>
> Boot test pass LAVA test jobs runs links,
> - https://lkft.validation.linaro.org/scheduler/job/8324919#L5075
> - https://lkft.validation.linaro.org/scheduler/job/8324918#L5105
>   - https://lkft.validation.linaro.org/scheduler/job/8324917#L5120
>
> - Naresh
>
> > Regards,
> > Nitin
> >
> >
> > > ## Boot log
> > > [    6.446825] ufshcd-qcom 1d84000.ufshc: ufshcd_populate_vreg: Unable
> > > to find vccq2-supply regulator, assuming enabled
> > > [    6.448070] Unable to handle kernel NULL pointer dereference at
> > > virtual address 0000000000000000
> > > [    6.448080] Mem abort info:
> > > [    6.448086]   ESR = 0x0000000096000006
> > > [    6.448093]   EC = 0x25: DABT (current EL), IL = 32 bits
> > > [    6.448101]   SET = 0, FnV = 0
> > > [    6.448107]   EA = 0, S1PTW = 0
> > > [    6.448113]   FSC = 0x06: level 2 translation fault
> > > [    6.448120] Data abort info:
> > > [    6.448125]   ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000
> > > [    6.448132]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> > > [    6.448139]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> > > [    6.448146] user pgtable: 4k pages, 48-bit VAs, pgdp=000000010447b000
> > > [    6.448154] [0000000000000000] pgd=080000010447d403,
> > > p4d=080000010447d403, pud=080000010447e403, pmd=0000000000000000
> > > [    6.448186] Internal error: Oops: 0000000096000006 [#1]  SMP
> > > [    6.448193] Modules linked in: qcom_q6v5_mss(+) ufs_qcom(+)
> > > cfg80211(+) coresight_stm stm_core phy_qcom_qmp_pcie rfkill qcom_wdt
> > > lmh(+) icc_osm_l3 qrtr slim_qcom_ngd_ctrl slimbus pdr_interface
> > > qcom_pdr_msg icc_bwmon qcom_q6v5_pas(+) llcc_qcom qcom_pil_info
> > > display_connector qcom_q6v5 qcom_sysmon drm_kms_helper qcom_common
> > > qcom_glink_smem mdt_loader qmi_helpers drm backlight socinfo rmtfs_mem
> > > [    6.448278] CPU: 6 UID: 0 PID: 385 Comm: (udev-worker) Not tainted
> > > 6.16.0-rc2-next-20250620 #1 PREEMPT
> > > [    6.448288] Hardware name: Thundercomm Dragonboard 845c (DT)
> > > [    6.448292] pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> > > [    6.448299] pc : ufs_qcom_setup_clocks+0x28/0x148 ufs_qcom
> > > [    6.448317] lr : ufshcd_setup_clocks
> > > (drivers/ufs/core/ufshcd-priv.h:142 drivers/ufs/core/ufshcd.c:9290)
> > > [    6.448332] sp : ffff800081213640
> > > [    6.448335] x29: ffff800081213640 x28: 0000000000000001 x27: ffff00008b633270
> > > [    6.448347] x26: ffff00008b6332a0 x25: ffff00008b632870 x24: 0000000000000000
> > > [    6.448359] x23: ffff00008b633280 x22: ffff00008b6332a0 x21: 0000000000000000
> > > [    6.448369] x20: ffffd7eabf84d618 x19: ffff00008b632870 x18: 0000000000000000
> > > [    6.448380] x17: 5453595342555300 x16: 305f666d745f6973 x15: 0000000000000100
> > > [    6.448391] x14: ffffffffffffffff x13: 0000000000000030 x12: 0101010101010101
> > > [    6.448402] x11: ffff00008188ea18 x10: 0000000000000000 x9 : ffffd7eabd9c3c28
> > > [    6.448413] x8 : ffff8000812134b8 x7 : fefefefefefefefe x6 : 0000000000000001
> > > [    6.448423] x5 : ffffffffffffffc8 x4 : 00000000c0000000 x3 : ffffd7eab32aa058
> > > [    6.448433] x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffff00008b632870
> > > [    6.448444] Call trace:
> > > [    6.448449] ufs_qcom_setup_clocks+0x28/0x148 ufs_qcom (P)
> > > [    6.448466] ufshcd_setup_clocks (drivers/ufs/core/ufshcd-priv.h:142
> > > drivers/ufs/core/ufshcd.c:9290)
> > > [    6.448477] ufshcd_init (drivers/ufs/core/ufshcd.c:9468
> > > drivers/ufs/core/ufshcd.c:10636)
> > > [    6.448485] ufshcd_pltfrm_init (drivers/ufs/host/ufshcd-pltfrm.c:504)
> > > [    6.448495] ufs_qcom_probe+0x28/0x68 ufs_qcom
> > > [    6.448508] platform_probe (drivers/base/platform.c:1404)
> > > [    6.448519] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:657)
> > > [    6.448526] __driver_probe_device (drivers/base/dd.c:799)
> > > [    6.448532] driver_probe_device (drivers/base/dd.c:829)
> > > [    6.448539] __driver_attach (drivers/base/dd.c:1216)
> > > [    6.448545] bus_for_each_dev (drivers/base/bus.c:370)
> > > [    6.448556] driver_attach (drivers/base/dd.c:1234)
> > > [    6.448567] bus_add_driver (drivers/base/bus.c:678)
> > > [    6.448577] driver_register (drivers/base/driver.c:249)
> > > [    6.448584] __platform_driver_register (drivers/base/platform.c:868)
> > > [    6.448592] ufs_qcom_pltform_init+0x28/0xff8 ufs_qcom
> > > [    6.448605] do_one_initcall (init/main.c:1274)
> > > [    6.448615] do_init_module (kernel/module/main.c:3041)
> > > [    6.448626] load_module (kernel/module/main.c:3511)
> > > [    6.448635] init_module_from_file (kernel/module/main.c:3704)
> > > [    6.448644] __arm64_sys_finit_module (kernel/module/main.c:3715
> > > kernel/module/main.c:3741 kernel/module/main.c:3725
> > > kernel/module/main.c:3725)
> > > [    6.448653] invoke_syscall (arch/arm64/include/asm/current.h:19
> > > arch/arm64/kernel/syscall.c:54)
> > > [    6.448661] el0_svc_common.constprop.0
> > > (include/linux/thread_info.h:135 (discriminator 2)
> > > arch/arm64/kernel/syscall.c:140 (discriminator 2))
> > > [    6.448668] do_el0_svc (arch/arm64/kernel/syscall.c:152)
> > > [    6.448674] el0_svc (arch/arm64/include/asm/irqflags.h:82
> > > (discriminator 1) arch/arm64/include/asm/irqflags.h:123 (discriminator
> > > 1) arch/arm64/include/asm/irqflags.h:136 (discriminator 1)
> > > arch/arm64/kernel/entry-common.c:165 (discriminator 1)
> > > arch/arm64/kernel/entry-common.c:178 (discriminator 1)
> > > arch/arm64/kernel/entry-common.c:768 (discriminator 1))
> > > [    6.448685] el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:787)
> > > [    6.448694] el0t_64_sync (arch/arm64/kernel/entry.S:600)
> > > [ 6.448705] Code: a90157f3 aa0003f3 f90013f6 f9405c15 (f94002b6)
> > > All code
> > > ========
> > >      0: a90157f3 stp x19, x21, [sp, #16]
> > >      4: aa0003f3 mov x19, x0
> > >      8: f90013f6 str x22, [sp, #32]
> > >      c: f9405c15 ldr x21, [x0, #184]
> > >     10:* f94002b6 ldr x22, [x21] <-- trapping instruction
> > >
> > > Code starting with the faulting instruction
> > > ===========================================
> > >      0: f94002b6 ldr x22, [x21]
> > > [    6.448710] ---[ end trace 0000000000000000 ]---
> > >
> > > ## Source
> > > * Kernel version: 6.16.0-rc2-next-20250620
> > > * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
> > > * Git sha: 2c923c845768a0f0e34b8161d70bc96525385782
> > > * Git describe: next-20250620
> > > * Project details:
> > > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250620/
> > > * Architectures: arm64 Dragonboard 845c
> > > * Toolchains: gcc-13
> > > * Kconfigs: defconfig+lkfttestconfigs
> > >
> > > ## Build arm64
> > > * Test log: https://qa-reports.linaro.org/api/testruns/28811906/log_file/
> > > * Test Lava log: https://lkft.validation.linaro.org/scheduler/job/8323501#L5646
> > > * Test Lava log 2:
> > > https://lkft.validation.linaro.org/scheduler/job/8323351#L5682
> > > * Test details:
> > > https://regressions.linaro.org/lkft/linux-next-master/next-20250620/boot/gcc-13-lkftconfig/
> > > * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2yj4otvwBRT4UktLTyKEN8ZtUQm/
> > > * Kernel config:
> > > https://storage.tuxsuite.com/public/linaro/lkft/builds/2yj4otvwBRT4UktLTyKEN8ZtUQm/config
> > >
> > > --
> > > Linaro LKFT
> > > https://lkft.linaro.org