Hi, I'm working on a PXA320 board. I have linux kernel 2.6.25 runnung on it. I have a problem with my USB driver. Whenever I mount it and try to do any kind of data transfer (say about even 12 - 16K) the driver gives me the following dump: <3>BUG: scheduling while atomic: usb-storage/753/0x00000002 [ 3221.785285] [<c0028454>] (dump_stack+0x0/0x14) from [<c00372c0>] (__schedule_bug+0x50/0x5c) [ 3221.795901] [<c0037270>] (__schedule_bug+0x0/0x5c) from [<c0267354>] (schedule+0x2dc/0x348) [ 3221.803652] r4:00000000 [ 3221.806167] [<c0267078>] (schedule+0x0/0x348) from [<bf038a84>] (oxu_urb_enqueue+0xb8/0x1a4 [oxu210hp_hcd]) [ 3221.817296] [<bf0389cc>] (oxu_urb_enqueue+0x0/0x1a4 [oxu210hp_hcd]) from [<bf0067dc>] (usb_hcd_submit_urb+0x2f8/0xac0 [usbcore]) [ 3221.829174] [<bf0064e4>] (usb_hcd_submit_urb+0x0/0xac0 [usbcore]) from [<bf007230>] (usb_submit_urb+0x148/0x32c [usbcore]) [ 3221.840012] [<bf0070e8>] (usb_submit_urb+0x0/0x32c [usbcore]) from [<bf009100>] (usb_sg_wait+0x74/0x21c [usbcore]) [ 3221.850013] r8:00000008 r7:00000000 r6:ce99e000 r5:00000020 r4:cf7c9ab4 [ 3221.856692] [<bf00908c>] (usb_sg_wait+0x0/0x21c [usbcore]) from [<bf024478>] (usb_stor_bulk_transfer_sglist+0x98/0x120 [usb_storage]) [ 3221.869639] [<bf0243e0>] (usb_stor_bulk_transfer_sglist+0x0/0x120 [usb_storage]) from [<bf024594>] (usb_stor_bulk_srb+0x30/0x48 [usb_storage]) [ 3221.880012] [<bf024564>] (usb_stor_bulk_srb+0x0/0x48 [usb_storage]) from [<bf0246c0>] (usb_stor_Bulk_transport+0x114/0x278 [usb_storage]) [ 3221.894608] r4:cff85c8f [ 3221.897122] [<bf0245ac>] (usb_stor_Bulk_transport+0x0/0x278 [usb_storage]) from [<bf024b48>] (usb_stor_invoke_transport+0x28/0x2dc [usb_storage]) [ 3221.910012] [<bf024b20>] (usb_stor_invoke_transport+0x0/0x2dc [usb_storage]) from [<bf023adc>] (usb_stor_transparent_scsi_command+0x10/0x14 [usb_storage]) [ 3221.920012] [<bf023acc>] (usb_stor_transparent_scsi_command+0x0/0x14 [usb_storage]) from [<bf025518>] (usb_stor_control_thread+0x264/0x2f0 [usb_storage]) [ 3221.936167] [<bf0252b4>] (usb_stor_control_thread+0x0/0x2f0 [usb_storage]) from [<c0052dd4>] (kthread+0x50/0x7c) [ 3221.947727] r7:00000000 r6:00000000 r5:bf0252b4 r4:cf7c9a54 [ 3221.953307] [<c0052d84>] (kthread+0x0/0x7c) from [<c003fc44>] (do_exit+0x0/0x74c) [ 3221.960039] r5:00000000 r4:00000000 [ 3221.963595] Then the driver resets and the initial handshake takes place properly, but later it again produces this dump leading eventually to hang up of the entire board. Because the error was occurring at irregular intervals, I thought the problem might be regarding the MSC register values, but even those when set to the slowest did not help. I have also tried USBMon and the logs don't suggest anything much different. If anyone has any inclination towards what the problem could be, that could be really useful. Thanks in advance, Saurabh -- 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
