Hi all, Currently I am testing USB serial device with BeagleBoard(omap3) which uses musb host controller. But I gets following Warnings every time if I tries to open the /dev/ttyUSB0 using simple application which I have written to open/read and write. FYI, I currently tested with 2.6.29-rc5 and also 2.6.29-rc2, with no success. What could be the possible reason? Is there any way, I can avoid this warning? Thanks for your valuable help. Regards, Shivdas ------------[ cut here ]------------ WARNING: at kernel/mutex.c:135 __mutex_lock_slowpath+0x6c/0x234() Modules linked in: usbserial [<c029d188>] (dump_stack+0x0/0x14) from [<c00516b4>] (warn_slowpath+0x68/0x9c) [<c005164c>] (warn_slowpath+0x0/0x9c) from [<c029e0d0>] (__mutex_lock_slowpath+0x6c/0x234) r3:c039437c r2:00000000 r7:c787e9c0 r6:c7bc6c00 r5:c7bc6fb4 r4:c7bc6c00 [<c029e064>] (__mutex_lock_slowpath+0x0/0x234) from [<c029e2a8>] (mutex_lock+0x10/0x14) [<c029e298>] (mutex_lock+0x0/0x14) from [<c01a0d10>] (echo_set_canon_col+0x1c/0x40) [<c01a0cf4>] (echo_set_canon_col+0x0/0x40) from [<c01a2bcc>] (n_tty_receive_buf+0xbdc/0x1074) r5:00000000 r4:000000fe [<c01a1ff0>] (n_tty_receive_buf+0x0/0x1074) from [<c01a513c>] (flush_to_ldisc+0xf0/0x184) [<c01a504c>] (flush_to_ldisc+0x0/0x184) from [<c01a520c>] (tty_flip_buffer_push+0x3c/0x4c) [<c01a51d0>] (tty_flip_buffer_push+0x0/0x4c) from [<bf0028b8>] (usb_serial_generic_read_bulk_callback+0x12c/0x170 [usbserial]) [<bf00278c>] (usb_serial_generic_read_bulk_callback+0x0/0x170 [usbserial]) from [<c01e60b8>] (usb_hcd_giveback_urb+0xb0/0xfc) r8:c78d88d8 r7:00000000 r6:c78d8800 r5:00000000 r4:c7851440 [<c01e6008>] (usb_hcd_giveback_urb+0x0/0xfc) from [<c01f8148>] (__musb_giveback+0xf4/0x110) r6:00000080 r5:c795c760 r4:c78d8800 [<c01f8054>] (__musb_giveback+0x0/0x110) from [<c01f825c>] (musb_giveback+0xf8/0x1e0) [<c01f8164>] (musb_giveback+0x0/0x1e0) from [<c01f8388>] (musb_advance_schedule+0x44/0xcc) [<c01f8344>] (musb_advance_schedule+0x0/0xcc) from [<c01f9814>] (musb_host_rx+0x890/0x8fc) r7:00000001 r6:00000001 r5:0000a203 r4:00000000 [<c01f8f84>] (musb_host_rx+0x0/0x8fc) from [<c01f5f3c>] (musb_dma_completion+0x54/0x58) [<c01f5ee8>] (musb_dma_completion+0x0/0x58) from [<c01fa2b8>] (dma_controller_irq+0x158/0x1a4) [<c01fa160>] (dma_controller_irq+0x0/0x1a4) from [<c0077a64>] (handle_IRQ_event+0x3c/0x74) [<c0077a28>] (handle_IRQ_event+0x0/0x74) from [<c0078e78>] (handle_level_irq+0x94/0xec) r7:0000005c r6:00000000 r5:0000005d r4:c036ceb0 [<c0078de4>] (handle_level_irq+0x0/0xec) from [<c002c058>] (__exception_text_start+0x58/0x70) r5:c7973e20 r4:0000005d [<c002c000>] (__exception_text_start+0x0/0x70) from [<c002ca30>] (__irq_svc+0x30/0x80) Exception stack(0xc7973d70 to 0xc7973db8) 3d60: 00000001 00000000 0000021c 00000000 3d80: 40000113 00000000 00000000 0000005c 40069000 c7058000 00000200 c7973dcc 3da0: 00000214 c7973db8 c01fa140 c01f67e8 60000113 ffffffff r5:d8200000 r4:ffffffff [<c01f6780>] (generic_interrupt+0x0/0xa4) from [<c0077a64>] (handle_IRQ_event+0x3c/0x74) r4:c7925de0 [<c0077a28>] (handle_IRQ_event+0x0/0x74) from [<c0078e78>] (handle_level_irq+0x94/0xec) r7:c7055968 r6:c787e9c0 r5:0000005c r4:c036ce74 [<c0078de4>] (handle_level_irq+0x0/0xec) from [<c002c058>] (__exception_text_start+0x58/0x70) r5:00000000 r4:0000005c [<c002c000>] (__exception_text_start+0x0/0x70) from [<c002ca30>] (__irq_svc+0x30/0x80) Exception stack(0xc7973e20 to 0xc7973e68) 3e20: c7959ae0 000001a4 c70f1800 c0371978 00000069 00000000 c787e9c0 c7055968 3e40: 40069000 c7058000 00000200 c7973ebc c7059000 c7973e68 c0032d24 c008e01c 3e60: 60000113 ffffffff r5:d8200000 r4:ffffffff [<c008df50>] (handle_mm_fault+0x0/0x5c4) from [<c0032d24>] (do_page_fault+0xe8/0x24c) [<c0032c3c>] (do_page_fault+0x0/0x24c) from [<c0032f2c>] (do_translation_fault+0x18/0x7c) [<c0032f14>] (do_translation_fault+0x0/0x7c) from [<c002c1b4>] (do_PrefetchAbort+0x18/0x1c) r7:00000000 r6:00000000 r5:00000000 r4:ffffffff [<c002c19c>] (do_PrefetchAbort+0x0/0x1c) from [<c002cd80>] (ret_from_exception+0x0/0x10) Exception stack(0xc7973fb0 to 0xc7973ff8) 3fa0: 0000983c bea0df20 00000003 0000983c 3fc0: 40023e08 00000000 00000000 00000000 00000000 00000000 40024000 bea0dcd4 3fe0: 40069518 bea0dbb0 000093e0 40069518 60000010 ffffffff ---[ end trace b3b574d010a6d594 ]--- Connected to /dev/ttyUSB0 Serial speed set to 115200. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
