Hi Bin, On Wed, Jan 27, 2016 at 11:01 AM, Ladislav Michl <ladis@xxxxxxxxxxxxxx> wrote: > Hi Felipe, > > On Wed, Dec 30, 2015 at 08:28:33AM -0600, Felipe Balbi wrote: >> IIRC, Bin and I had a lengthy discussion about these WARNs on >> MUSB. MUSB's documents aren't very helpful when discussing FIFO >> flush. There's some ambiguity there; This seems to be easier to >> reproduce with interrupt endpoints since that's also what Bin pointed >> to. > > Is there anything I could debug to move things forward? > >> In any case, I think there might be something we could do to make this >> slightly better. I'll see what I can do for v4.5-rc > > Any chance it will actually happen? MUSB is still unusable for me and > doesn't work properly since TI's 2.6.37 kernel (oldest one I have > tried)... The issue with musb_h_tx_flush_fifo still persists. Kernel 4.5.0-rc6. Just activating SImCOM SIM7100E produces following error: # usb 1-1.3: new high-speed USB device number 6 using musb-hdrc usbcore: registered new interface driver option usbserial: USB Serial support registered for GSM modem (1-port) option 1-1.3:1.0: GSM modem (1-port) converter detected usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4 option 1-1.3:1.1: GSM modem (1-port) converter detected usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB5 option 1-1.3:1.2: GSM modem (1-port) converter detected usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB6 option 1-1.3:1.3: GSM modem (1-port) converter detected usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB7 option 1-1.3:1.4: GSM modem (1-port) converter detected usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB8 qmi_wwan 1-1.3:1.5: cdc-wdm0: USB WDM device qmi_wwan 1-1.3:1.5 wwan0: register 'qmi_wwan' at usb-musb-hdrc.0.auto-1.3, WWAN/QMI device, b2:67:d8:31:8f:b6 usbcore: registered new interface driver qmi_wwan ------------[ cut here ]------------ WARNING: CPU: 0 PID: 868 at drivers/usb/musb/musb_host.c:139 musb_h_tx_flush_fifo+0xc4/0xe4() musb-hdrc musb-hdrc.0.auto: Could not flush host TX2 fifo: csr: 2403 Modules linked in: qmi_wwan option usb_wwan ftdi_sio usbserial musb_dsps musb_am335x CPU: 0 PID: 868 Comm: ModemManager Not tainted 4.5.0-rc6 #47 Hardware name: Generic AM33XX (Flattened Device Tree) [<c0017e34>] (unwind_backtrace) from [<c0014088>] (show_stack+0x10/0x14) [<c0014088>] (show_stack) from [<c02c5b24>] (dump_stack+0xb0/0xe4) [<c02c5b24>] (dump_stack) from [<c003bca4>] (warn_slowpath_common+0x7c/0xb8) [<c003bca4>] (warn_slowpath_common) from [<c003bd10>] (warn_slowpath_fmt+0x30/0x40) [<c003bd10>] (warn_slowpath_fmt) from [<c041ec10>] (musb_h_tx_flush_fifo+0xc4/0xe4) [<c041ec10>] (musb_h_tx_flush_fifo) from [<c041fd54>] (musb_cleanup_urb+0xbc/0x130) [<c041fd54>] (musb_cleanup_urb) from [<c0420404>] (musb_urb_dequeue+0xf0/0x128) [<c0420404>] (musb_urb_dequeue) from [<c03fa82c>] (usb_hcd_unlink_urb+0x50/0x84) [<c03fa82c>] (usb_hcd_unlink_urb) from [<c03fba70>] (usb_kill_urb+0x4c/0xc4) [<c03fba70>] (usb_kill_urb) from [<bf02f85c>] (usb_wwan_close+0xbc/0xf0 [usb_wwan]) [<bf02f85c>] (usb_wwan_close [usb_wwan]) from [<c0322ce8>] (tty_port_shutdown+0x90/0x9c) [<c0322ce8>] (tty_port_shutdown) from [<c03233cc>] (tty_port_close+0x24/0x4c) [<c03233cc>] (tty_port_close) from [<c031a258>] (tty_release+0xec/0x478) [<c031a258>] (tty_release) from [<c014ef38>] (__fput+0x80/0x1d0) [<c014ef38>] (__fput) from [<c005a8d8>] (task_work_run+0x90/0xc4) [<c005a8d8>] (task_work_run) from [<c0013a4c>] (do_work_pending+0x8c/0xb4) [<c0013a4c>] (do_work_pending) from [<c000f8e8>] (slow_work_pending+0xc/0x20) ---[ end trace fb2fc0420e2c4594 ]--- Could you please take a look at this? Yegor -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
