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Nikolaus Schaller" Date: Sun, 4 Apr 2021 11:29:00 +0200 Cc: stable@vger.kernel.org, Linux Kernel Mailing List , Linux-OMAP , kernel@pyra-handheld.com, Discussions about the Letux Kernel , linux-usb@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: To: Wesley Cheng , Felipe Balbi , gregkh@linuxfoundation.org X-Mailer: Apple Mail (2.3124) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org it seems as if the patch 9de499997c37 ("usb: dwc3: gadget: Prevent EP queuing while = stopping transfers") in v5.11.y f09ddcfcb8c5 ("usb: dwc3: gadget: Prevent EP queuing while = stopping transfers") in v5.12-rc5 reproducible breaks dwc3 RNDIS gadget, at least on the Pyra Handheld = (OMAP5). The symptom of having this patch in tree (v5.11.10 or v5.12) is that rndis/gadget initially works after boot. But after unplugging the cable, a replug gives warnings like the = following and RNDIS isn't up and running any more: [ 72.009811] ------------[ cut here ]------------ [ 72.014768] WARNING: CPU: 0 PID: 2499 at = drivers/usb/dwc3/gadget.c:361 dwc3_send_gadget_ep_cmd+0x1f8/0x330 [dwc3] [ 72.025846] dwc3 4a030000.usb: No resource for ep2in [ 72.031125] Modules linked in: bnep usb_f_ecm g_ether usb_f_rndis = u_ether libcomposite configfs ipv6 snd_soc_omap_hdmi wl18xx wlcore = panel_boe_btl507212_w677l mac80211 snd_soc_spdif_tx snd_soc_dmic dwc3 = roles cfg80211 libarc4 snd_soc_omap_abe_twl6040 snd_soc_simple_card = omapdrm pvrsrvkm_omap5_sgx544_116 snd_soc_omap_mcpdm = snd_soc_simple_card_utils etnaviv wwan_on_off snd_soc_twl6040 leds_gpio = snd_soc_gtm601 drm_kms_helper pwm_bl pwm_omap_dmtimer ti_tpd12s015 = display_connector generic_adc_battery snd_soc_w2cbw003_bt gpu_sched = syscopyarea sysfillrect sysimgblt fb_sys_fops cec drm = drm_panel_orientation_quirks omap_sham omap_aes_driver crypto_engine = omap_crypto ehci_omap dwc3_omap wlcore_sdio snd_soc_ts3a227e ina2xx_adc = leds_is31fl319x tsc2007 bq2429x_charger bq27xxx_battery_i2c = bq27xxx_battery ina2xx as5013 tca8418_keypad twl6040_vibra bmp280_spi = clk_twl6040 gpio_twl6040 hci_uart btbcm palmas_pwrbutton palmas_gpadc = usb3503 bluetooth bmc150_accel_i2c bmc150_magn_i2c bmp280_i2c bmg160_ i2c [ 72.032887] bmc150_accel_core bmc150_magn bmg160_core bmp280 = ecdh_generic bno055 industrialio_triggered_buffer ecc kfifo_buf = industrialio snd_soc_omap_aess snd_soc_omap_mcbsp snd_soc_ti_sdma [ 72.143285] CPU: 0 PID: 2499 Comm: irq/200-dwc3 Not tainted = 5.12.0-rc5-letux-lpae+ #5479 [ 72.151914] Hardware name: Generic OMAP5 (Flattened Device Tree) [ 72.158300] [] (unwind_backtrace) from [] = (show_stack+0x10/0x14) [ 72.166595] [] (show_stack) from [] = (dump_stack+0x8c/0xac) [ 72.174325] [] (dump_stack) from [] = (__warn+0xcc/0xf4) [ 72.181668] [] (__warn) from [] = (warn_slowpath_fmt+0x70/0x9c) [ 72.189664] [] (warn_slowpath_fmt) from [] = (dwc3_send_gadget_ep_cmd+0x1f8/0x330 [dwc3]) [ 72.200223] [] (dwc3_send_gadget_ep_cmd [dwc3]) from = [] (__dwc3_gadget_ep_enable+0x344/0x420 [dwc3]) [ 72.212003] [] (__dwc3_gadget_ep_enable [dwc3]) from = [] (dwc3_gadget_ep_enable+0xb8/0xe8 [dwc3]) [ 72.223420] [] (dwc3_gadget_ep_enable [dwc3]) from = [] (usb_ep_enable+0x3c/0xd4) [ 72.233182] [] (usb_ep_enable) from [] = (ecm_set_alt+0x48/0x13c [usb_f_ecm]) [ 72.242490] [] (ecm_set_alt [usb_f_ecm]) from [] = (composite_setup+0xa88/0x152c [libcomposite]) [ 72.253629] [] (composite_setup [libcomposite]) from = [] (dwc3_ep0_delegate_req+0x2c/0x40 [dwc3]) [ 72.264981] [] (dwc3_ep0_delegate_req [dwc3]) from = [] (dwc3_ep0_interrupt+0x31c/0x824 [dwc3]) [ 72.276122] [] (dwc3_ep0_interrupt [dwc3]) from = [] (dwc3_process_event_buf+0x11c/0xa50 [dwc3]) [ 72.287357] [] (dwc3_process_event_buf [dwc3]) from = [] (dwc3_thread_interrupt+0x24/0x3c [dwc3]) [ 72.298679] [] (dwc3_thread_interrupt [dwc3]) from = [] (irq_thread_fn+0x1c/0x5c) [ 72.308440] [] (irq_thread_fn) from [] = (irq_thread+0x158/0x1e8) [ 72.316617] [] (irq_thread) from [] = (kthread+0x138/0x148) [ 72.324254] [] (kthread) from [] = (ret_from_fork+0x14/0x34) [ 72.331968] Exception stack(0xc2e99fb0 to 0xc2e99ff8) [ 72.337339] 9fa0: 00000000 = 00000000 00000000 00000000 [ 72.346022] 9fc0: 00000000 00000000 00000000 00000000 00000000 = 00000000 00000000 00000000 [ 72.354716] 9fe0: 00000000 00000000 00000000 00000000 00000013 = 00000000 [ 72.361753] ---[ end trace d949466d43afc2cb ]--- [ 72.366675] ------------[ cut here ]------------ [ 72.371579] WARNING: CPU: 0 PID: 2499 at = drivers/usb/gadget/udc/core.c:278 usb_ep_queue+0xe8/0x108 [ 72.381131] Modules linked in: bnep usb_f_ecm g_ether usb_f_rndis = u_ether libcomposite configfs ipv6 snd_soc_omap_hdmi wl18xx wlcore = panel_boe_btl507212_w677l mac80211 snd_soc_spdif_tx snd_soc_dmic dwc3 = roles cfg80211 libarc4 snd_soc_omap_abe_twl6040 snd_soc_simple_card = omapdrm pvrsrvkm_omap5_sgx544_116 snd_soc_omap_mcpdm = snd_soc_simple_card_utils etnaviv wwan_on_off snd_soc_twl6040 leds_gpio = snd_soc_gtm601 drm_kms_helper pwm_bl pwm_omap_dmtimer ti_tpd12s015 = display_connector generic_adc_battery snd_soc_w2cbw003_bt gpu_sched = syscopyarea sysfillrect sysimgblt fb_sys_fops cec drm = drm_panel_orientation_quirks omap_sham omap_aes_driver crypto_engine = omap_crypto ehci_omap dwc3_omap wlcore_sdio snd_soc_ts3a227e ina2xx_adc = leds_is31fl319x tsc2007 bq2429x_charger bq27xxx_battery_i2c = bq27xxx_battery ina2xx as5013 tca8418_keypad twl6040_vibra bmp280_spi = clk_twl6040 gpio_twl6040 hci_uart btbcm palmas_pwrbutton palmas_gpadc = usb3503 bluetooth bmc150_accel_i2c bmc150_magn_i2c bmp280_i2c bmg160_ i2c [ 72.382817] bmc150_accel_core bmc150_magn bmg160_core bmp280 = ecdh_generic bno055 industrialio_triggered_buffer ecc kfifo_buf = industrialio snd_soc_omap_aess snd_soc_omap_mcbsp snd_soc_ti_sdma [ 72.493132] CPU: 0 PID: 2499 Comm: irq/200-dwc3 Tainted: G W = 5.12.0-rc5-letux-lpae+ #5479 [ 72.503202] Hardware name: Generic OMAP5 (Flattened Device Tree) [ 72.509581] [] (unwind_backtrace) from [] = (show_stack+0x10/0x14) [ 72.517852] [] (show_stack) from [] = (dump_stack+0x8c/0xac) [ 72.525571] [] (dump_stack) from [] = (__warn+0xcc/0xf4) [ 72.532926] [] (__warn) from [] = (warn_slowpath_fmt+0x70/0x9c) [ 72.540921] [] (warn_slowpath_fmt) from [] = (usb_ep_queue+0xe8/0x108) [ 72.549558] [] (usb_ep_queue) from [] = (ecm_do_notify+0x138/0x158 [usb_f_ecm]) [ 72.559049] [] (ecm_do_notify [usb_f_ecm]) from = [] (ecm_set_alt+0x134/0x13c [usb_f_ecm]) [ 72.569524] [] (ecm_set_alt [usb_f_ecm]) from [] = (composite_setup+0xa88/0x152c [libcomposite]) [ 72.580626] [] (composite_setup [libcomposite]) from = [] (dwc3_ep0_delegate_req+0x2c/0x40 [dwc3]) [ 72.592038] [] (dwc3_ep0_delegate_req [dwc3]) from = [] (dwc3_ep0_interrupt+0x31c/0x824 [dwc3]) [ 72.603209] [] (dwc3_ep0_interrupt [dwc3]) from = [] (dwc3_process_event_buf+0x11c/0xa50 [dwc3]) [ 72.614469] [] (dwc3_process_event_buf [dwc3]) from = [] (dwc3_thread_interrupt+0x24/0x3c [dwc3]) [ 72.625793] [] (dwc3_thread_interrupt [dwc3]) from = [] (irq_thread_fn+0x1c/0x5c) [ 72.635556] [] (irq_thread_fn) from [] = (irq_thread+0x158/0x1e8) [ 72.643705] [] (irq_thread) from [] = (kthread+0x138/0x148) [ 72.651334] [] (kthread) from [] = (ret_from_fork+0x14/0x34) [ 72.659055] Exception stack(0xc2e99fb0 to 0xc2e99ff8) [ 72.664437] 9fa0: 00000000 = 00000000 00000000 00000000 [ 72.673123] 9fc0: 00000000 00000000 00000000 00000000 00000000 = 00000000 00000000 00000000 [ 72.681821] 9fe0: 00000000 00000000 00000000 00000000 00000013 = 00000000 [ 72.688840] ---[ end trace d949466d43afc2cc ]--- [ 72.708346] bq2429x_charger 1-006b: bq2429x_usb_detect: state = changed: state->[ HOST FCHG INDPM PWRGOOD] fault->[] [ 72.719587] bq2429x_charger 1-006b: bq2429x: VBUS became available [ 72.920591] ------------[ cut here ]------------ [ 72.925514] WARNING: CPU: 0 PID: 2499 at = drivers/usb/dwc3/gadget.c:361 dwc3_send_gadget_ep_cmd+0x1f8/0x330 [dwc3] [ 72.936612] dwc3 4a030000.usb: No resource for ep1in [ 72.941892] Modules linked in: bnep usb_f_ecm g_ether usb_f_rndis = u_ether libcomposite configfs ipv6 snd_soc_omap_hdmi wl18xx wlcore = panel_boe_btl507212_w677l mac80211 snd_soc_spdif_tx snd_soc_dmic dwc3 = roles cfg80211 libarc4 snd_soc_omap_abe_twl6040 snd_soc_simple_card = omapdrm pvrsrvkm_omap5_sgx544_116 snd_soc_omap_mcpdm = snd_soc_simple_card_utils etnaviv wwan_on_off snd_soc_twl6040 leds_gpio = snd_soc_gtm601 drm_kms_helper pwm_bl pwm_omap_dmtimer ti_tpd12s015 = display_connector generic_adc_battery snd_soc_w2cbw003_bt gpu_sched = syscopyarea sysfillrect sysimgblt fb_sys_fops cec drm = drm_panel_orientation_quirks omap_sham omap_aes_driver crypto_engine = omap_crypto ehci_omap dwc3_omap wlcore_sdio snd_soc_ts3a227e ina2xx_adc = leds_is31fl319x tsc2007 bq2429x_charger bq27xxx_battery_i2c = bq27xxx_battery ina2xx as5013 tca8418_keypad twl6040_vibra bmp280_spi = clk_twl6040 gpio_twl6040 hci_uart btbcm palmas_pwrbutton palmas_gpadc = usb3503 bluetooth bmc150_accel_i2c bmc150_magn_i2c bmp280_i2c bmg160_ i2c [ 72.943662] bmc150_accel_core bmc150_magn bmg160_core bmp280 = ecdh_generic bno055 industrialio_triggered_buffer ecc kfifo_buf = industrialio snd_soc_omap_aess snd_soc_omap_mcbsp snd_soc_ti_sdma [ 73.054078] CPU: 0 PID: 2499 Comm: irq/200-dwc3 Tainted: G W = 5.12.0-rc5-letux-lpae+ #5479 [ 73.064176] Hardware name: Generic OMAP5 (Flattened Device Tree) [ 73.070582] [] (unwind_backtrace) from [] = (show_stack+0x10/0x14) [ 73.078867] [] (show_stack) from [] = (dump_stack+0x8c/0xac) [ 73.086585] [] (dump_stack) from [] = (__warn+0xcc/0xf4) [ 73.093930] [] (__warn) from [] = (warn_slowpath_fmt+0x70/0x9c) [ 73.101926] [] (warn_slowpath_fmt) from [] = (dwc3_send_gadget_ep_cmd+0x1f8/0x330 [dwc3]) [ 73.112425] [] (dwc3_send_gadget_ep_cmd [dwc3]) from = [] (__dwc3_gadget_ep_enable+0x344/0x420 [dwc3]) [ 73.124234] [] (__dwc3_gadget_ep_enable [dwc3]) from = [] (dwc3_gadget_ep_enable+0xb8/0xe8 [dwc3]) [ 73.135678] [] (dwc3_gadget_ep_enable [dwc3]) from = [] (usb_ep_enable+0x3c/0xd4) [ 73.145444] [] (usb_ep_enable) from [] = (gether_connect+0x24/0x19c [u_ether]) [ 73.154873] [] (gether_connect [u_ether]) from [] = (ecm_set_alt+0x11c/0x13c [usb_f_ecm]) [ 73.165258] [] (ecm_set_alt [usb_f_ecm]) from [] = (composite_setup+0xba8/0x152c [libcomposite]) [ 73.176368] [] (composite_setup [libcomposite]) from = [] (dwc3_ep0_delegate_req+0x2c/0x40 [dwc3]) [ 73.187772] [] (dwc3_ep0_delegate_req [dwc3]) from = [] (dwc3_ep0_interrupt+0x430/0x824 [dwc3]) [ 73.198919] [] (dwc3_ep0_interrupt [dwc3]) from = [] (dwc3_process_event_buf+0x11c/0xa50 [dwc3]) [ 73.210172] [] (dwc3_process_event_buf [dwc3]) from = [] (dwc3_thread_interrupt+0x24/0x3c [dwc3]) [ 73.221494] [] (dwc3_thread_interrupt [dwc3]) from = [] (irq_thread_fn+0x1c/0x5c) [ 73.231260] [] (irq_thread_fn) from [] = (irq_thread+0x158/0x1e8) [ 73.239411] [] (irq_thread) from [] = (kthread+0x138/0x148) [ 73.247041] [] (kthread) from [] = (ret_from_fork+0x14/0x34) [ 73.254758] Exception stack(0xc2e99fb0 to 0xc2e99ff8) [ 73.260135] 9fa0: 00000000 = 00000000 00000000 00000000 [ 73.268815] 9fc0: 00000000 00000000 00000000 00000000 00000000 = 00000000 00000000 00000000 [ 73.277476] 9fe0: 00000000 00000000 00000000 00000000 00000013 = 00000000 [ 73.284490] ---[ end trace d949466d43afc2cd ]--- Even once I was able to trigger a kernel panic just by = unplugging/replugging the cable. Reverting this patch makes DWC3 work again after cable unplug/replug. On both, v5.11.10 and 5.12-rc5. Please suggest a fix for testing. BR and thanks, Nikolaus Schaller