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971237b900
When runtime PM send SSU times out, the SCSI core invokes eh_host_reset_handler, in this case ufshcd_eh_host_reset_handler(), which is then stuck waiting for flush_work(&hba->eh_work). However, ufshcd_err_handler hangs in wait RPM resume. Do link recovery only in this case. The following IO hang stack dump was observed: kworker/4:0 D <ffffffd7d31f6fb4> __switch_to+0x180/0x344 <ffffffd7d31f779c> __schedule+0x5ec/0xa14 <ffffffd7d31f7c3c> schedule+0x78/0xe0 <ffffffd7d31fefbc> schedule_timeout+0xb0/0x15c <ffffffd7d31f8120> io_schedule_timeout+0x48/0x70 <ffffffd7d31f8e40> do_wait_for_common+0x108/0x19c <ffffffd7d31f837c> wait_for_completion_io_timeout+0x50/0x78 <ffffffd7d2876bc0> blk_execute_rq+0x1b8/0x218 <ffffffd7d2b4297c> scsi_execute_cmd+0x148/0x238 <ffffffd7d2da7358> ufshcd_set_dev_pwr_mode+0xe8/0x244 <ffffffd7d2da7e40> __ufshcd_wl_resume+0x1e0/0x45c <ffffffd7d2da7b28> ufshcd_wl_runtime_resume+0x3c/0x174 <ffffffd7d2b4f290> scsi_runtime_resume+0x7c/0xc8 <ffffffd7d2ae1d48> __rpm_callback+0xa0/0x410 <ffffffd7d2ae0128> rpm_resume+0x43c/0x67c <ffffffd7d2ae1e98> __rpm_callback+0x1f0/0x410 <ffffffd7d2ae014c> rpm_resume+0x460/0x67c <ffffffd7d2ae1450> pm_runtime_work+0xa4/0xac <ffffffd7d22e39ac> process_one_work+0x208/0x598 <ffffffd7d22e3fc0> worker_thread+0x228/0x438 <ffffffd7d22eb038> kthread+0x104/0x1d4 <ffffffd7d22171a0> ret_from_fork+0x10/0x20 scsi_eh_0 D <ffffffd7d31f6fb4> __switch_to+0x180/0x344 <ffffffd7d31f779c> __schedule+0x5ec/0xa14 <ffffffd7d31f7c3c> schedule+0x78/0xe0 <ffffffd7d31fef50> schedule_timeout+0x44/0x15c <ffffffd7d31f8e40> do_wait_for_common+0x108/0x19c <ffffffd7d31f8234> wait_for_completion+0x48/0x64 <ffffffd7d22deb88> __flush_work+0x260/0x2d0 <ffffffd7d22de918> flush_work+0x10/0x20 <ffffffd7d2da4728> ufshcd_eh_host_reset_handler+0x88/0xcc <ffffffd7d2b41da4> scsi_try_host_reset+0x48/0xe0 <ffffffd7d2b410fc> scsi_eh_ready_devs+0x934/0xa40 <ffffffd7d2b41618> scsi_error_handler+0x168/0x374 <ffffffd7d22eb038> kthread+0x104/0x1d4 <ffffffd7d22171a0> ret_from_fork+0x10/0x20 kworker/u16:5 D <ffffffd7d31f6fb4> __switch_to+0x180/0x344 <ffffffd7d31f779c> __schedule+0x5ec/0xa14 <ffffffd7d31f7c3c> schedule+0x78/0xe0 <ffffffd7d2adfe00> rpm_resume+0x114/0x67c <ffffffd7d2adfca8> __pm_runtime_resume+0x70/0xb4 <ffffffd7d2d9cf48> ufshcd_err_handler+0x1a0/0xe68 <ffffffd7d22e39ac> process_one_work+0x208/0x598 <ffffffd7d22e3fc0> worker_thread+0x228/0x438 <ffffffd7d22eb038> kthread+0x104/0x1d4 <ffffffd7d22171a0> ret_from_fork+0x10/0x20 Signed-off-by: Peter Wang <peter.wang@mediatek.com> Link: https://lore.kernel.org/r/20230927033557.13801-1-peter.wang@mediatek.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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| .. | ||
| accel | ||
| accessibility | ||
| acpi | ||
| amba | ||
| android | ||
| ata | ||
| atm | ||
| auxdisplay | ||
| base | ||
| bcma | ||
| block | ||
| bluetooth | ||
| bus | ||
| cache | ||
| cdrom | ||
| cdx | ||
| char | ||
| clk | ||
| clocksource | ||
| comedi | ||
| connector | ||
| counter | ||
| cpufreq | ||
| cpuidle | ||
| crypto | ||
| cxl | ||
| dax | ||
| dca | ||
| devfreq | ||
| dio | ||
| dma | ||
| dma-buf | ||
| edac | ||
| eisa | ||
| extcon | ||
| firewire | ||
| firmware | ||
| fpga | ||
| fsi | ||
| genpd | ||
| gnss | ||
| gpio | ||
| gpu | ||
| greybus | ||
| hid | ||
| hsi | ||
| hte | ||
| hv | ||
| hwmon | ||
| hwspinlock | ||
| hwtracing | ||
| i2c | ||
| i3c | ||
| idle | ||
| iio | ||
| infiniband | ||
| input | ||
| interconnect | ||
| iommu | ||
| ipack | ||
| irqchip | ||
| isdn | ||
| leds | ||
| macintosh | ||
| mailbox | ||
| mcb | ||
| md | ||
| media | ||
| memory | ||
| memstick | ||
| message | ||
| mfd | ||
| misc | ||
| mmc | ||
| most | ||
| mtd | ||
| mux | ||
| net | ||
| nfc | ||
| ntb | ||
| nubus | ||
| nvdimm | ||
| nvme | ||
| nvmem | ||
| of | ||
| opp | ||
| parisc | ||
| parport | ||
| pci | ||
| pcmcia | ||
| peci | ||
| perf | ||
| phy | ||
| pinctrl | ||
| platform | ||
| pnp | ||
| power | ||
| powercap | ||
| pps | ||
| ps3 | ||
| ptp | ||
| pwm | ||
| rapidio | ||
| ras | ||
| regulator | ||
| remoteproc | ||
| reset | ||
| rpmsg | ||
| rtc | ||
| s390 | ||
| sbus | ||
| scsi | ||
| sh | ||
| siox | ||
| slimbus | ||
| soc | ||
| soundwire | ||
| spi | ||
| spmi | ||
| ssb | ||
| staging | ||
| target | ||
| tc | ||
| tee | ||
| thermal | ||
| thunderbolt | ||
| tty | ||
| ufs | ||
| uio | ||
| usb | ||
| vdpa | ||
| vfio | ||
| vhost | ||
| video | ||
| virt | ||
| virtio | ||
| vlynq | ||
| w1 | ||
| watchdog | ||
| xen | ||
| zorro | ||
| Kconfig | ||
| Makefile | ||