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Message-ID: <CAAd53p4NQfALZ0p2vKFe=+KCByOQUMrOJddyLek0Y16Bx0x9TA@mail.gmail.com>
Date: Thu, 21 Sep 2023 14:07:12 +0800
From: Kai-Heng Feng <kai.heng.feng@...onical.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Ricky WU <ricky_wu@...ltek.com>, "arnd@...db.de" <arnd@...db.de>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] misc: rtsx: Fix an error access Page fault
[+Cc Rafael, linux-pm]
On Mon, Sep 18, 2023 at 3:30 PM Ricky WU <ricky_wu@...ltek.com> wrote:
>
> Hi Kai-heng，
>
> It is not work, still get fail..
> Dmesg log as below
> ------------------------------------------------------------------
> [ 122.214916] pcieport 0000:00:1c.0: pciehp: Slot(8): Link Down
> [ 122.227416] BUG: unable to handle page fault for address: ffff9fa180089010
> [ 122.227428] #PF: supervisor read access in kernel mode
> [ 122.227430] #PF: error_code(0x0000) - not-present page
> [ 122.227432] PGD 100000067 P4D 100000067 PUD 1001fe067 PMD 1001ff067 PTE 0
> [ 122.227438] Oops: 0000 [#1] PREEMPT SMP PTI
> [ 122.227441] CPU: 3 PID: 1956 Comm: kworker/3:11 Not tainted 6.4.0 #7
> [ 122.227444] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./H370M Pro4, BIOS P3.40 10/25/2018
> [ 122.227446] Workqueue: pm pm_runtime_work
> [ 122.227452] RIP: 0010:ioread32+0x2e/0x70
> [ 122.227456] Code: ff 03 00 77 25 48 81 ff 00 00 01 00 77 14 8b 15 08 d9 54 01 b8 ff ff ff ff 85 d2 75 14 c3 cc cc cc cc 89 fa ed c3 cc cc cc cc <8b> 07 c3 cc cc cc cc 55 83 ea 01 48 89 fe 48 c7 c7 98 6f d5 a7 48
> [ 122.227459] RSP: 0018:ffff9fa1836d7d78 EFLAGS: 00010296
> [ 122.227461] RAX: ffff9fa180089000 RBX: 0000000000000310 RCX: 000000000000007f
> [ 122.227462] RDX: 000000000000ff00 RSI: ffff9fa180089010 RDI: ffff9fa180089010
> [ 122.227464] RBP: ffff9fa1836d7d98 R08: ffff9fa180089010 R09: 0000000000000000
> [ 122.227465] R10: ffff8ac55298deb4 R11: 0000000000000003 R12: 000000000000007f
> [ 122.227466] R13: ffff8ac54022e000 R14: ffff8ac54022e100 R15: 0000000000009003
> [ 122.227468] FS: 0000000000000000(0000) GS:ffff8ac5aa180000(0000) knlGS:0000000000000000
> [ 122.227470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 122.227472] CR2: ffff9fa180089010 CR3: 0000000115a32006 CR4: 00000000003706e0
> [ 122.227473] Call Trace:
> [ 122.227475] <TASK>
> [ 122.227477] ? show_regs+0x68/0x70
> [ 122.227481] ? __die_body+0x20/0x70
> [ 122.227483] ? __die+0x2b/0x40
> [ 122.227485] ? page_fault_oops+0x160/0x480
> [ 122.227488] ? search_bpf_extables+0x63/0x90
> [ 122.227490] ? ioread32+0x2e/0x70
> [ 122.227493] ? search_exception_tables+0x5f/0x70
> [ 122.227497] ? kernelmode_fixup_or_oops+0xa2/0x120
> [ 122.227499] ? __bad_area_nosemaphore+0x179/0x230
> [ 122.227501] ? bad_area_nosemaphore+0x16/0x20
> [ 122.227503] ? do_kern_addr_fault+0x8b/0xa0
> [ 122.227505] ? exc_page_fault+0xe5/0x180
> [ 122.227509] ? asm_exc_page_fault+0x27/0x30
> [ 122.227514] ? ioread32+0x2e/0x70
> [ 122.227517] ? rtsx_pci_write_register+0x5b/0x90 [rtsx_pci]
> [ 122.227527] rtsx_set_l1off_sub+0x1c/0x30 [rtsx_pci]
> [ 122.227536] rts5261_set_l1off_cfg_sub_d0+0x36/0x40 [rtsx_pci]
> [ 122.227545] rtsx_pci_runtime_idle+0xc7/0x160 [rtsx_pci]
> [ 122.227553] ? __pfx_pci_pm_runtime_idle+0x10/0x10
> [ 122.227557] pci_pm_runtime_idle+0x34/0x70
> [ 122.227559] rpm_idle+0xc4/0x2b0
> [ 122.227562] pm_runtime_work+0x93/0xc0
> [ 122.227565] process_one_work+0x21a/0x430
> [ 122.227569] worker_thread+0x4a/0x3c0
> [ 122.227572] ? __pfx_worker_thread+0x10/0x10
> [ 122.227574] kthread+0x106/0x140
> [ 122.227577] ? __pfx_kthread+0x10/0x10
> [ 122.227579] ret_from_fork+0x29/0x50
> [ 122.227585] </TASK>
> [ 122.227586] Modules linked in: nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio intel_rapl_msr intel_rapl_common snd_sof_pci_intel_cnl snd_sof_intel_hda_common snd_soc_hdac_hda soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda_mlink snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi soundwire_bus snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel kvm_intel snd_intel_dspcfg snd_intel_sdw_acpi i915 kvm mei_hdcp crct10dif_pclmul snd_hda_codec ghash_clmulni_intel sha512_ssse3 aesni_intel binfmt_misc crypto_simd snd_hda_core cryptd snd_hwdep snd_pcm input_leds drm_buddy snd_seq_midi rapl snd_seq_midi_event ttm joydev snd_rawmidi drm_display_helper ee1004 intel_cstate cec snd_seq wmi_bmof rc_core snd_seq_device snd_timer mei_me drm_kms_helper snd soundcore mei intel_pch_thermal i2c_algo_bit syscopyarea sysfillrect
> [ 122.227634] sysimgblt mac_hid acpi_pad acpi_tad sch_fq_codel msr parport_pc ppdev lp drm parport ramoops reed_solomon efi_pstore ip_tables x_tables autofs4 hid_generic usbhid hid rtsx_pci_sdmmc i2c_i801 e1000e ahci crc32_pclmul xhci_pci i2c_smbus rtsx_pci libahci xhci_pci_renesas video wmi
> [ 122.227656] CR2: ffff9fa180089010
> [ 122.227658] ---[ end trace 0000000000000000 ]---
> [ 122.384633] RIP: 0010:ioread32+0x2e/0x70
> [ 122.384642] Code: ff 03 00 77 25 48 81 ff 00 00 01 00 77 14 8b 15 08 d9 54 01 b8 ff ff ff ff 85 d2 75 14 c3 cc cc cc cc 89 fa ed c3 cc cc cc cc <8b> 07 c3 cc cc cc cc 55 83 ea 01 48 89 fe 48 c7 c7 98 6f d5 a7 48
> [ 122.384644] RSP: 0018:ffff9fa1836d7d78 EFLAGS: 00010296
> [ 122.384647] RAX: ffff9fa180089000 RBX: 0000000000000310 RCX: 000000000000007f
> [ 122.384649] RDX: 000000000000ff00 RSI: ffff9fa180089010 RDI: ffff9fa180089010
> [ 122.384650] RBP: ffff9fa1836d7d98 R08: ffff9fa180089010 R09: 0000000000000000
> [ 122.384652] R10: ffff8ac55298deb4 R11: 0000000000000003 R12: 000000000000007f
> [ 122.384653] R13: ffff8ac54022e000 R14: ffff8ac54022e100 R15: 0000000000009003
> [ 122.384654] FS: 0000000000000000(0000) GS:ffff8ac5aa180000(0000) knlGS:0000000000000000
> [ 122.384656] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 122.384658] CR2: ffff9fa180089010 CR3: 0000000119526001 CR4: 00000000003706e0
> [ 122.384660] note: kworker/3:11[1956] exited with irqs disabled
> -------------------------------------------------------------------
>
[snipped]
> > Does the following change work for you?
> >
> > diff --git a/drivers/pci/hotplug/pciehp_ctrl.c
> > b/drivers/pci/hotplug/pciehp_ctrl.c
> > index dcdbfcf404dd..ef93364a4422 100644
> > --- a/drivers/pci/hotplug/pciehp_ctrl.c
> > +++ b/drivers/pci/hotplug/pciehp_ctrl.c
> > @@ -356,6 +356,7 @@ static int pciehp_disable_slot(struct controller *ctrl,
> > bool safe_removal)
> > int ret;
> >
> > pm_runtime_get_sync(&ctrl->pcie->port->dev);
> > + pm_runtime_barrier(&ctrl->pcie->port->dev);
> > ret = __pciehp_disable_slot(ctrl, safe_removal);
> > pm_runtime_put(&ctrl->pcie->port->dev);
The issue is that when the PCI cardreader gets hot unplugged,
rtsx_pci_runtime_idle still gets scheduled.
And using pm_runtime_barrier() is still not enough.
Is this something should be addressed by PM core?
Kai-Heng
> >
> >
> > Kai-Heng
> >
> > >
> > > > >
> > > > > Fixes: 597568e8df04 ("misc: rtsx: Rework runtime power management
> > > > > flow")
> > > > > Cc: Kai-Heng Feng <kai.heng.feng@...onical.com>
> > > > > Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
> > > > > ---
> > > > > drivers/misc/cardreader/rtsx_pcr.c | 14 ++++++++------
> > > > > drivers/mmc/host/rtsx_pci_sdmmc.c | 1 +
> > > > > include/linux/rtsx_pci.h | 1 +
> > > > > 3 files changed, 10 insertions(+), 6 deletions(-)
> > > > >
> > > > > diff --git a/drivers/misc/cardreader/rtsx_pcr.c
> > > > > b/drivers/misc/cardreader/rtsx_pcr.c
> > > > > index a3f4b52bb159..536a3681fd5e 100644
> > > > > --- a/drivers/misc/cardreader/rtsx_pcr.c
> > > > > +++ b/drivers/misc/cardreader/rtsx_pcr.c
> > > > > @@ -1526,6 +1526,7 @@ static int rtsx_pci_probe(struct pci_dev
> > *pcidev,
> > > > > pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr +
> > > > HOST_CMDS_BUF_LEN;
> > > > > pcr->card_inserted = 0;
> > > > > pcr->card_removed = 0;
> > > > > + pcr->is_sd_express = false;
> > > > > INIT_DELAYED_WORK(&pcr->carddet_work,
> > > > rtsx_pci_card_detect);
> > > > >
> > > > > pcr->msi_en = msi_en;
> > > > > @@ -1735,12 +1736,13 @@ static int rtsx_pci_runtime_idle(struct
> > > > > device
> > > > > *device)
> > > > >
> > > > > pcr->state = PDEV_STAT_IDLE;
> > > > >
> > > > > - if (pcr->ops->disable_auto_blink)
> > > > > - pcr->ops->disable_auto_blink(pcr);
> > > > > - if (pcr->ops->turn_off_led)
> > > > > - pcr->ops->turn_off_led(pcr);
> > > > > -
> > > > > - rtsx_pm_power_saving(pcr);
> > > > > + if (!pcr->is_sd_express) {
> > > > > + if (pcr->ops->disable_auto_blink)
> > > > > + pcr->ops->disable_auto_blink(pcr);
> > > > > + if (pcr->ops->turn_off_led)
> > > > > + pcr->ops->turn_off_led(pcr);
> > > > > + rtsx_pm_power_saving(pcr);
> > > > > + }
> > > > >
> > > > > mutex_unlock(&pcr->pcr_mutex);
> > > > >
> > > > > diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c
> > > > > b/drivers/mmc/host/rtsx_pci_sdmmc.c
> > > > > index 87d78432a1e0..80b2f2a31fdc 100644
> > > > > --- a/drivers/mmc/host/rtsx_pci_sdmmc.c
> > > > > +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
> > > > > @@ -1393,6 +1393,7 @@ static int sdmmc_init_sd_express(struct
> > > > > mmc_host
> > > > *mmc, struct mmc_ios *ios)
> > > > > RTS5261_MCU_BUS_SEL_MASK |
> > > > RTS5261_MCU_CLOCK_SEL_MASK
> > > > > | RTS5261_DRIVER_ENABLE_FW,
> > > > > RTS5261_MCU_CLOCK_SEL_16M |
> > > > RTS5261_DRIVER_ENABLE_FW);
> > > > > + pcr->is_sd_express = true;
> > > > > host->eject = true;
> > > > > return 0;
> > > > > }
> > > > > diff --git a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h
> > > > > index
> > > > > 534038d962e4..295e92224fd0 100644
> > > > > --- a/include/linux/rtsx_pci.h
> > > > > +++ b/include/linux/rtsx_pci.h
> > > > > @@ -1262,6 +1262,7 @@ struct rtsx_pcr {
> > > > > u8 ocp_stat;
> > > > > u8 ocp_stat2;
> > > > > u8 rtd3_en;
> > > > > + bool is_sd_express;
> > > > > };
> > > > >
> > > > > #define PID_524A 0x524A
> > > > > --
> > > > > 2.25.1
> > > > >
> > > >
> > > > ------Please consider the environment before printing this e-mail.
> > >
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