AM3354: 拔插U盘导致后续usb无法再生成节点，usb无法使用

使用4.1.18版本 内核

拔插U盘报cppi41_stop_chan警告，后续再插入u盘无法生成/dev/sda*节点

7.465741] usb 2-1.2: new high-speed USB device number 8 using musb-hdrc
[47.586802] usb 2-1.2: New USB device found, idVendor=14cd, idProduct=2536
[47.593746] usb 2-1.2: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[47.601383] usb 2-1.2: Product: Mass Storage Device
[47.606319] usb 2-1.2: Manufacturer: Generic USB Device
[47.612034] usb 2-1.2: SerialNumber: 2536201609180000
[47.624742] usb-storage 2-1.2:1.0: USB Mass Storage device detected
[47.640044] scsi host5: usb-storage 2-1.2:1.0
[48.646522] scsi 5:0:0:0: Direct-AccessMassStorage Device1.00 PQ: 0 ANSI: 0 CCS
[48.661282] sd 5:0:0:0: [sda] 15630336 512-byte logical blocks: (8.00 GB/7.45 GiB)
[48.676750] sd 5:0:0:0: [sda] Write Protect is off
[48.681596] sd 5:0:0:0: [sda] Mode Sense: 03 00 00 00
[48.690803] sd 5:0:0:0: [sda] No Caching mode page found
[48.696291] sd 5:0:0:0: [sda] Assuming drive cache: write through
[48.707835]  sda: sda1
[48.716875] sd 5:0:0:0: [sda] Attached SCSI removable disk
[48.733075] pm_runtime_get
[48.815747] usb 2-1.2: reset high-speed USB device number 8 using musb-hdrc
[49.946034] usb 2-1.2: USB disconnect, device number 8
[49.951493] pm_runtime_get
[49.954048] ------------[ cut here ]------------
[49.958894] WARNING: CPU: 0 PID: 37 at drivers/dma/cppi41.c:611 cppi41_stop_chan+0x230/0x32c()
[49.967539] Modules linked in: spi_printer(O+) bc_example(O) pvrsrvkm(O)
[49.974300] CPU: 0 PID: 37 Comm: kworker/0:2 Tainted: GDO4.1.18 #334
[49.981898] Hardware name: Generic AM33XX (Flattened Device Tree)
[49.988028] Workqueue: usb_hub_wq hub_event
[49.992229] Backtrace:
[49.994711] [<c0012b18>] (dump_backtrace) from [<c0012d38>] (show_stack+0x18/0x1c)
[50.002310]  r7:c08110b4 r6:00000263 r5:00000009 r4:00000000
[50.008030] [<c0012d20>] (show_stack) from [<c065f804>] (dump_stack+0x20/0x28)
[50.015289] [<c065f7e4>] (dump_stack) from [<c0035cf0>] (warn_slowpath_common+0x7c/0xb4)
[50.023415] [<c0035c74>] (warn_slowpath_common) from [<c0035dcc>] (warn_slowpath_null+0x24/0x2c)
[50.032234]  r8:00000010 r7:ddb45410 r6:ddb45410 r5:ddb45490 r4:ddb46f80
[50.038997] [<c0035da8>] (warn_slowpath_null) from [<c037394c>] (cppi41_stop_chan+0x230/0x32c)
[50.047659] [<c037371c>] (cppi41_stop_chan) from [<c04d7a28>] (cppi41_dma_channel_abort+0xf4/0x214)
[50.056741]  r10:c0941e80 r9:c0941e8c r8:e09a4c10 r7:ddc0a010 r6:00000004 r5:00000000
[50.064631]  r4:dd81d05c r3:c037371c
[50.068235] [<c04d7934>] (cppi41_dma_channel_abort) from [<c04d4cd8>] (musb_cleanup_urb+0x64/0x13c)
[50.077315]  r10:00000001 r9:dd81d05c r8:e09a4c10 r7:c0008880 r6:dcaa3a00 r5:00000080
[50.085203]  r4:ddc0a460
[50.087753] [<c04d4c74>] (musb_cleanup_urb) from [<c04d5468>] (musb_urb_dequeue+0x150/0x160)
[50.096222]  r10:00000001 r9:ddff2800 r8:dcaa3a00 r7:c0008880 r6:ddc0a010 r5:a00b0193
[50.104111]  r4:00000000 r3:ddff2800
[50.107715] [<c04d5318>] (musb_urb_dequeue) from [<c049ee10>] (unlink1+0x38/0x158)
[50.115313]  r10:00000002 r9:ddccd800 r8:ddbe2e00 r7:ffffff94 r6:ddbe2e00 r5:ddb92000
[50.123201]  r4:dcaa3a00 r3:c04d5318
[50.126804] [<c049edd8>] (unlink1) from [<c04a024c>] (usb_hcd_flush_endpoint+0x144/0x184)
[50.135012]  r8:ddbe2e00 r7:dcaa3480 r6:dcaa3490 r5:ddb92000 r4:dcaa3a00
[50.141775] [<c04a0108>] (usb_hcd_flush_endpoint) from [<c04a2f7c>] (usb_disable_endpoint+0x50/0x98)
[50.150944]  r9:ddccd800 r8:00000000 r7:ddd1a000 r6:dca7c088 r5:ddd1a000 r4:dcaa3480
[50.158755] [<c04a2f2c>] (usb_disable_endpoint) from [<c04a3008>] (usb_disable_interface+0x44/0x5c)
[50.167836]  r5:00000000 r4:00000000
[50.171440] [<c04a2fc4>] (usb_disable_interface) from [<c04a58b4>] (usb_unbind_interface+0x1e0/0x280)
[50.180695]  r9:ddccd800 r8:ddccd600 r7:c08ffccc r6:ddccd620 r5:ddd1a068 r4:ddd1a000
[50.188507] [<c04a56d4>] (usb_unbind_interface) from [<c03f0508>] (__device_release_driver+0x78/0xec)
[50.197762]  r10:00000002 r9:ddccd800 r8:c0940f7c r7:ddd1a068 r6:c08fef94 r5:c08ffccc
[50.205650]  r4:ddccd620
[50.208198] [<c03f0490>] (__device_release_driver) from [<c03f05a0>] (device_release_driver+0x24/0x30)
[50.217540]  r5:ddccd620 r4:ddccd654
[50.221142] [<c03f057c>] (device_release_driver) from [<c03effc4>] (bus_remove_device+0xdc/0x10c)
[50.230047]  r5:ddccd620 r4:dd922f2c
[50.233657] [<c03efee8>] (bus_remove_device) from [<c03ecd94>] (device_del+0x110/0x218)
[50.241691]  r7:ddd1a068 r6:ddccd628 r5:ddccd620 r4:ddd1a000
[50.247398] [<c03ecc84>] (device_del) from [<c04a30c8>] (usb_disable_device+0xa8/0x1ec)
[50.255433]  r8:ddccd600 r7:ddbe2e00 r6:00000000 r5:00000001 r4:ddd1a000
[50.262194] [<c04a3020>] (usb_disable_device) from [<c0499ef8>] (usb_disconnect+0x70/0x258)
[50.270577]  r9:ddccd800 r8:ddbe7e00 r7:ddd1a068 r6:ddd1a09c r5:ddd1a000 r4:00000000
[50.278388] [<c0499e88>] (usb_disconnect) from [<c049ba6c>] (hub_event+0x554/0x1120)
[50.286160]  r10:00000002 r9:00000100 r8:ddc19b04 r7:ddc04c00 r6:00000002 r5:00000004
[50.294052]  r4:00000000
[50.296610] [<c049b518>] (hub_event) from [<c004a39c>] (process_one_work+0x12c/0x374)
[50.304470]  r10:ddb6df80 r9:00000000 r8:c08dd158 r7:de347800 r6:00000000 r5:ddc19b04
[50.312359]  r4:ddb6df80
[50.314909] [<c004a270>] (process_one_work) from [<c004a644>] (worker_thread+0x60/0x5cc)
[50.323031]  r10:ddb6df80 r9:00000000 r8:c08dd158 r7:c08dd168 r6:00000008 r5:ddb6df98
[50.330919]  r4:c08dd158
[50.333469] [<c004a5e4>] (worker_thread) from [<c004fa14>] (kthread+0xd4/0xf0)
[50.340718]  r10:00000000 r9:00000000 r8:00000000 r7:c004a5e4 r6:ddb6df80 r5:ddb730c0
[50.348607]  r4:00000000
[50.351156] [<c004f940>] (kthread) from [<c000f928>] (ret_from_fork+0x14/0x2c)
[50.358406]  r7:00000000 r6:00000000 r5:c004f940 r4:ddb730c0
[50.364111] ---[ end trace e169cfd9255a0258 ]---
[50.376305] scsi 5:0:0:0: rejecting I/O to offline device
[50.381763] scsi 5:0:0:0: [sda] killing request
[50.386325] scsi 5:0:0:0: rejecting I/O to offline device
[50.391749] scsi 5:0:0:0: [sda] killing request
[50.396301] scsi 5:0:0:0: rejecting I/O to dead device
[50.401508] scsi 5:0:0:0: rejecting I/O to dead device
[50.406692] scsi 5:0:0:0: rejecting I/O to dead device
[50.411990] scsi 5:0:0:0: [sda] UNKNOWN(0x2003) Result: hostbyte=0x01 driverbyte=0x00
[50.419888] scsi 5:0:0:0: [sda] CDB: opcode=0x28 28 00 00 00 00 20 00 00 18 00
[50.427165] blk_update_request: I/O error, dev sda, sector 32
[50.432973] scsi 5:0:0:0: [sda] UNKNOWN(0x2003) Result: hostbyte=0x01 driverbyte=0x00
[50.440860] scsi 5:0:0:0: [sda] CDB: opcode=0x28 28 00 00 00 00 10 00 00 08 00
[50.448126] blk_update_request: I/O error, dev sda, sector 16
[50.454516] Buffer I/O error on dev sda, logical block 2, async page read
[50.462111] Buffer I/O error on dev sda, logical block 2, async page read

后更换SDK版本9.01.00 内核版本6.1.45在官方开发板上复现

root@am335x-evm:/proc/sys/kernel# [ 3012.816671] usb 2-1: USB disconnect, device number 24
[ 3012.822727] ------------[ cut here ]------------
[ 3012.827401] WARNING: CPU: 0 PID: 1273 at drivers/dma/ti/cppi41.c:720 cppi41_stop_chan+0x1c8/0x3f8 [cppi41]
[ 3012.837202] Modules linked in: uas irq_pruss_intc pru_rproc 8250_pruss sha256_generic libsha256 sha256_arm ti_am335x_tsc cfg80211 snd_soc_simple_card snd_soc_simple_card_utils pvrsrvkm(O) pruss tilcdc drm_dma_helper pwm_tiecap snd_soc_davinci_mcasp snd_soc_ti_udma snd_soc_ti_edma snd_soc_ti_sdma musb_dsps musb_hdrc phy_am335x phy_am335x_control rtc_omap cppi41 omap_wdt snd_soc_tlv320aic3x_i2c snd_soc_tlv320aic3x snd_soc_core rtc_tps65910 snd_pcm_dmaengine ac97_bus snd_pcm snd_timer snd ti_am335x_tscadc soundcore cryptodev(O)
[ 3012.884408] CPU: 0 PID: 1273 Comm: kworker/0:1 Tainted: GO6.1.46-g1d4b5da681 #1
[ 3012.893357] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 3012.899501] Workqueue: usb_hub_wq hub_event
[ 3012.903807]  unwind_backtrace from show_stack+0x10/0x14
[ 3012.909123]  show_stack from dump_stack_lvl+0x24/0x2c
[ 3012.914262]  dump_stack_lvl from __warn+0x7c/0x130
[ 3012.919157]  __warn from warn_slowpath_fmt+0x9c/0x178
[ 3012.924304]  warn_slowpath_fmt from cppi41_stop_chan+0x1c8/0x3f8 [cppi41]
[ 3012.931221]  cppi41_stop_chan [cppi41] from cppi41_dma_channel_abort+0x134/0x2e0 [musb_hdrc]
[ 3012.939895]  cppi41_dma_channel_abort [musb_hdrc] from musb_cleanup_urb+0x58/0x200 [musb_hdrc]
[ 3012.948733]  musb_cleanup_urb [musb_hdrc] from musb_urb_dequeue+0x114/0x1a0 [musb_hdrc]
[ 3012.956960]  musb_urb_dequeue [musb_hdrc] from usb_hcd_flush_endpoint+0x11c/0x158
[ 3012.964599]  usb_hcd_flush_endpoint from usb_disable_interface+0x54/0xd4
[ 3012.971385]  usb_disable_interface from usb_unbind_interface+0x110/0x268
[ 3012.978172]  usb_unbind_interface from device_release_driver_internal+0x194/0x21c
[ 3012.985753]  device_release_driver_internal from bus_remove_device+0xcc/0xf8
[ 3012.992883]  bus_remove_device from device_del+0x16c/0x468
[ 3012.998461]  device_del from usb_disable_device+0xcc/0x178
[ 3013.004029]  usb_disable_device from usb_disconnect+0xb4/0x224
[ 3013.009953]  usb_disconnect from hub_event+0x984/0x16a8
[ 3013.015271]  hub_event from process_one_work+0x1c0/0x4bc
[ 3013.020694]  process_one_work from worker_thread+0x58/0x584
[ 3013.026361]  worker_thread from kthread+0xd8/0x108
[ 3013.031249]  kthread from ret_from_fork+0x14/0x2c
[ 3013.036024] Exception stack(0xd040dfb0 to 0xd040dff8)
[ 3013.041127] dfa0:00000000 00000000 00000000 00000000
[ 3013.049372] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 3013.057613] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 3013.064276] ---[ end trace 0000000000000000 ]---
[ 3013.069483] BUG: scheduling while atomic: kworker/0:1/1273/0x00000002
[ 3013.076084] Modules linked in: uas irq_pruss_intc pru_rproc 8250_pruss sha256_generic libsha256 sha256_arm ti_am335x_tsc cfg80211 snd_soc_simple_card snd_soc_simple_card_utils pvrsrvkm(O) pruss tilcdc drm_dma_helper pwm_tiecap snd_soc_davinci_mcasp snd_soc_ti_udma snd_soc_ti_edma snd_soc_ti_sdma musb_dsps musb_hdrc phy_am335x phy_am335x_control rtc_omap cppi41 omap_wdt snd_soc_tlv320aic3x_i2c snd_soc_tlv320aic3x snd_soc_core rtc_tps65910 snd_pcm_dmaengine ac97_bus snd_pcm snd_timer snd ti_am335x_tscadc soundcore cryptodev(O)
[ 3013.123342] Preemption disabled at:
[ 3013.123359] [<bf0dbf74>] musb_urb_dequeue+0x40/0x1a0 [musb_hdrc]
[ 3013.133115] CPU: 0 PID: 1273 Comm: kworker/0:1 Tainted: GW  O6.1.46-g1d4b5da681 #1
[ 3013.142066] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 3013.148208] Workqueue: usb_hub_wq hub_event
[ 3013.152482]  unwind_backtrace from show_stack+0x10/0x14
[ 3013.157788]  show_stack from dump_stack_lvl+0x24/0x2c
[ 3013.162917]  dump_stack_lvl from __schedule_bug+0x88/0x9c
[ 3013.168391]  __schedule_bug from __schedule+0x52c/0x6bc
[ 3013.173679]  __schedule from schedule+0x54/0xf0
[ 3013.178266]  schedule from schedule_timeout+0xb0/0x140
[ 3013.183476]  schedule_timeout from __wait_for_common+0x88/0x1d0
[ 3013.189467]  __wait_for_common from devtmpfs_submit_req+0x70/0x94
[ 3013.195655]  devtmpfs_submit_req from devtmpfs_delete_node+0x70/0x94
[ 3013.202099]  devtmpfs_delete_node from device_del+0x3d0/0x468
[ 3013.207942]  device_del from cdev_device_del+0x14/0x44
[ 3013.213163]  cdev_device_del from bsg_unregister_queue+0x38/0x44
[ 3013.219249]  bsg_unregister_queue from __scsi_remove_device+0xfc/0x158
[ 3013.225875]  __scsi_remove_device from scsi_forget_host+0x94/0xac
[ 3013.232053]  scsi_forget_host from scsi_remove_host+0x7c/0x1dc
[ 3013.237983]  scsi_remove_host from usb_stor_disconnect+0x44/0xe4
[ 3013.244102]  usb_stor_disconnect from usb_unbind_interface+0x78/0x268
[ 3013.250642]  usb_unbind_interface from device_release_driver_internal+0x194/0x21c
[ 3013.258214]  device_release_driver_internal from bus_remove_device+0xcc/0xf8
[ 3013.265340]  bus_remove_device from device_del+0x16c/0x468
[ 3013.270906]  device_del from usb_disable_device+0xcc/0x178
[ 3013.276472]  usb_disable_device from usb_disconnect+0xb4/0x224
[ 3013.282397]  usb_disconnect from hub_event+0x984/0x16a8
[ 3013.287714]  hub_event from process_one_work+0x1c0/0x4bc
[ 3013.293132]  process_one_work from worker_thread+0x58/0x584
[ 3013.298800]  worker_thread from kthread+0xd8/0x108
[ 3013.303678]  kthread from ret_from_fork+0x14/0x2c
[ 3013.308450] Exception stack(0xd040dfb0 to 0xd040dff8)
[ 3013.313552] dfa0:00000000 00000000 00000000 00000000
[ 3013.321796] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 3013.330037] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 3013.336957] sd 0:0:0:0: [sda] Unaligned partial completion (resid=2, sector_sz=512)
[ 3013.358079] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 ee 7f f8 00 00 01 00
[ 3013.374451] sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=14s
[ 3013.394427] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 ee 7f f8 00 00 01 00
[ 3013.407657] I/O error, dev sda, sector 15630328 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 3013.417846] device offline error, dev sda, sector 15630328 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[ 3013.429302] buffer_io_error: 6 callbacks suppressed
[ 3013.429324] Buffer I/O error on dev sda, logical block 1953791, async page read

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Taylor：

您好，

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

,

Links：

你好，

在第一个日志中，拔下USB设备时，消息来自哪一行？

在第二个日志中，拔下USB设备时是否会打印第一行？如果是这样，请在连接设备时附加枚举控制台日志。

你用哪个“官方发展委员会”来重现这个问题？

问题只发生在单个USB设备上还是发生在不同品牌的设备上？

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Arabic
Hebrew
Polish

Bulgarian
Hindi
Portuguese

Catalan
Hmong Daw
Romanian

Chinese Simplified
Hungarian
Russian

Chinese Traditional
Indonesian
Slovak

Czech
Italian
Slovenian

Danish
Japanese
Spanish

Dutch
Klingon
Swedish

English
Korean
Thai

Estonian
Latvian
Turkish

Finnish
Lithuanian
Ukrainian

French
Malay
Urdu

German
Maltese
Vietnamese

Greek
Norwegian
Welsh

Haitian Creole
Persian

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,

jie chen：

1.在第一个日志中拔下usb消息来自第19行（每次出现异常的情况在拔出之前都会第18行usb-reset的日志）2.在拔出usb设备时会打印第一行,这个是当时的枚举日志后面的就跟上面贴的第二个日志一样

[945.778883] usb 2-1: new high-speed USB device number 50 using musb-hdrc
[945.908121] usb-storage 2-1:1.0: USB Mass Storage device detected
[945.919418] scsi host0: usb-storage 2-1:1.0
[946.977891] scsi 0:0:0:0: Direct-AccessMassStorage Device1.00 PQ: 0 ANSI: 0 CCS
[946.985365] sd 0:0:0:0: [sda] 15630336 512-byte logical blocks: (8.00 GB/7.45 GiB)
[946.985569] sd 0:0:0:0: [sda] Write Protect is off
[946.985740] sd 0:0:0:0: [sda] No Caching mode page found
[946.985751] sd 0:0:0:0: [sda] Assuming drive cache: write through
[947.021659]sda: sda1
[947.022401] sd 0:0:0:0: [sda] Attached SCSI removable disk
[948.021659] musb-hdrc musb-hdrc.1: ep2 RX three-strikes error
[952.022401] usb 2-1: USB disconnect, device number 50
[95.581764] sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=0s
[957.581796] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 00 00 38 00 00 08 00
[947.021659] blk_print_reg_errot: 10 callbacks suppressed
root@am335x-evm:/proc/sys/kernel# [ 3012.816671] usb 2-1: USB disconnect, device number 24

3.是使用am335x-evm. 的sdk自带的镜像am335x-evmsk.dtb和zImage-am335x-evm.bin4.目前只发现一款u盘容易复现，还有我司另一个连的usb打印机也有类似现象，以下链接e2e.ti.com/…/am3354-am3354-usb-mushw_tx_flush-fifo

,

Links：

你好，

您在9天前发布的第一个日志在USB枚举结束时显示了以下消息。

  [  948.021659] musb-hdrc musb-hdrc.1: ep2 RX three-strikes error

每次发生USB问题时，是否都会打印此消息？

,

jie chen：

不是每次都打印musb-hdrc musb-hdrc.1: ep2 RX three-strikes error

,

Links：

jie chen 说：后更换SDK版本9.01.00 内核版本6.1.45在官方开发板上复现

在EVM上安装SDK9.1时，请在内核配置中禁用CPPI41_DMA，看看问题是否仍然存在。如果是，请附上控制台日志。

,

jie chen：

root@am335x-evm:~# [35.385667] usb 2-1.2: new high-speed USB device number 3 using musb-hdrc
[35.506687] usb 2-1.2: New USB device found, idVendor=14cd, idProduct=2536
[35.513609] usb 2-1.2: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[35.521286] usb 2-1.2: Product: Mass Storage Device
[35.526231] usb 2-1.2: Manufacturer: Generic USB Device
[35.531914] usb 2-1.2: SerialNumber: 2536201609180000
[35.545793] usb-storage 2-1.2:1.0: USB Mass Storage device detected
[35.560692] scsi host0: usb-storage 2-1.2:1.0
[36.566456] scsi 0:0:0:0: Direct-AccessMassStorage Device1.00 PQ: 0 ANSI: 0 CCS
[36.581248] sd 0:0:0:0: [sda] 15630336 512-byte logical blocks: (8.00 GB/7.45 GiB)
[36.593508] sd 0:0:0:0: [sda] Write Protect is off
[36.605017] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00
[36.610766] sd 0:0:0:0: [sda] No Caching mode page found
[36.616568] sd 0:0:0:0: [sda] Assuming drive cache: write through
[36.628244]sda: sda1
[36.637723] sd 0:0:0:0: [sda] Attached SCSI removable disk
[36.775683] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[36.915829] musb_ep_program 896: broken !rx_reinit, ep2 csr 0003
[37.015659] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[37.155797] musb_ep_program 896: broken !rx_reinit, ep2 csr 0003
[37.255662] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[37.475649] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[37.695668] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[37.835786] musb_ep_program 896: broken !rx_reinit, ep2 csr 0003
[37.935659] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[38.056286] sd 0:0:0:0: [sda] UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x00
[38.064014] sd 0:0:0:0: [sda] CDB: opcode=0x28 28 00 00 00 01 70 00 00 90 00
[38.071125] blk_update_request: I/O error, dev sda, sector 368
[38.155696] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[38.375658] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[38.595652] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[38.815653] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[39.035653] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[39.255664] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[39.376205] sd 0:0:0:0: [sda] UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x00
[39.383912] sd 0:0:0:0: [sda] CDB: opcode=0x28 28 00 00 00 01 70 00 00 08 00
[39.391025] blk_update_request: I/O error, dev sda, sector 368
[39.396912] Buffer I/O error on dev sda, logical block 46, async page read
[39.495665] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[39.715661] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[39.935659] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[40.155666] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[40.375652] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[40.595654] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[40.716209] sd 0:0:0:0: [sda] UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x00
[40.723914] sd 0:0:0:0: [sda] CDB: opcode=0x28 28 00 00 00 01 70 00 00 08 00
[40.731039] blk_update_request: I/O error, dev sda, sector 368
[40.736918] Buffer I/O error on dev sda, logical block 46, async page read
[40.825677] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[41.045664] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrcroot@am335x-evm:~# [41.266080] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[41.485661] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[41.705661] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[41.925659] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrcroot@am335x-evm:~# [42.125667] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrcroot@am335x-evm:~# [42.345668] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrcroot@am335x-evm:~# [42.565661] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[42.785654] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[43.005663] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[43.225658] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[43.425659] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[43.645651] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[43.865650] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[44.085675] usb 2-1.2: reset high-speed USB device number 3 using musb-hdrc
[44.226107] sda: detected capacity change from 8002732032 to 0
[44.313064] sd 0:0:0:0: [sda] 15630336 512-byte logical blocks: (8.00 GB/7.45 GiB)
[44.322925]sda: sda1
root@am335x-evm:~#
root@am335x-evm:~# [44.908243] FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.

禁用CPPI41_DMA暂时未复现，插入U盘会频繁reset，才枚举成功。

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Links：

日志中的总线重置可能是由于USB传输中的数据损坏造成的。为了真正理解这个问题，您可能需要一个USB协议分析器来捕获USB设备枚举期间的USB流量。