CC linux-usb 2010/9/17 Patriarche, Herve <herve.patriarche@xxxxxxxxxxxxx>: > Hi Tom, > > I am currently working on a quasi EHCI driver on linux 2.6.27 and I > currently got similar Warning as you get into usb test : > http://www.spinics.net/lists/linux-usb/msg34223.html > I wonder if you have any advice to fix it ? I guess your ehci driver may have the flag HCD_LOCAL_MEM set. Could you confirm this? There is really a issue in hcd of usbcore, which may cause the warning if the flag HCD_LOCAL_MEM is set. > > , Member of Technical Staff, Wind River > > direct +33 4 76 23 45 94 mobile +33 6 70 23 10 68 fax +33 4 76 23 45 > 99 > > > > > root@MM6_160117:/# usb 1-1: new high speed USB device using oxu210hp-ehci > and address 2 > usb 1-1: New USB device found, idVendor=07ab, idProduct=fcf6 > usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > usb 1-1: Product: DataBar USB2.0 > usb 1-1: Manufacturer: Freecom > usb 1-1: SerialNumber: 905708280446 > usb 1-1: configuration #1 chosen from 1 choice > scsi0 : SCSI emulation for USB Mass Storage devices > scsi 0:0:0:0: Direct-Access Freecom DataBar USB2.0 1100 PQ: 0 ANSI: 0 > CCS > sd 0:0:0:0: [sda] 1957888 512-byte hardware sectors (1002 MB) > sd 0:0:0:0: [sda] Write Protect is off > sd 0:0:0:0: [sda] Assuming drive cache: write through > usb 1-1: reset high speed USB device using oxu210hp-ehci and address 2 > sd 0:0:0:0: [sda] 1957888 512-byte hardware sectors (1002 MB) > sd 0:0:0:0: [sda] Write Protect is off > sd 0:0:0:0: [sda] Assuming drive cache: write through > sda:<4>------------[ cut here ]------------ > WARNING: at > /data/cubic/wks/Cubic_ltt/build/linux/arch/arm/mm/consistent.c:368 > dma_free_coherent+0x2e8/0x354() > Modules linked in: cfbfillrect cfbimgblt cfbcopyarea pxafb slhc ppp_generic > crc_ccitt ppp_async usbserial sierra > [<c02b7ad4>] (dump_stack+0x0/0x14) from [<c003dae0>] > (warn_on_slowpath+0x4c/0x84) > [<c003da94>] (warn_on_slowpath+0x0/0x84) from [<c002ae6c>] > (dma_free_coherent+0x2e8/0x354) > r6:00001004 r5:c0361700 r4:d0886000 > [<c002ab84>] (dma_free_coherent+0x0/0x354) from [<c0209874>] > (hcd_buffer_free+0x5c/0x98) > [<c0209818>] (hcd_buffer_free+0x0/0x98) from [<c02032b8>] > (hcd_free_coherent+0x64/0x8c) > r5:d0886000 r4:cf905400 > [<c0203254>] (hcd_free_coherent+0x0/0x8c) from [<c02033c4>] > (unmap_urb_for_dma+0xe4/0xe8) > [<c02032e0>] (unmap_urb_for_dma+0x0/0xe8) from [<c0203408>] > (usb_hcd_giveback_urb+0x40/0xd0) > r5:00000000 r4:cf9fd480 > [<c02033c8>] (usb_hcd_giveback_urb+0x0/0xd0) from [<c0211d98>] > (ehci_urb_done+0xac/0x12c) > r5:00000000 r4:cf905400 > [<c0211cec>] (ehci_urb_done+0x0/0x12c) from [<c0212aac>] > (qh_completions+0x3d0/0x458) > r9:cf9054c0 r8:d0880180 r7:ffffff8d r6:ffffff8d r5:d0881240 > r4:d0881240 > [<c02126dc>] (qh_completions+0x0/0x458) from [<c02154fc>] > (ehci_work+0xa4/0xa60) > [<c0215458>] (ehci_work+0x0/0xa60) from [<c0216990>] (ehci_irq+0x1d4/0x1f4) > [<c02167bc>] (ehci_irq+0x0/0x1f4) from [<c02031ec>] (usb_hcd_irq+0x44/0xac) > [<c02031a8>] (usb_hcd_irq+0x0/0xac) from [<c006beac>] > (handle_IRQ_event+0xbc/0x190) > r5:00000000 r4:cf9e3220 > [<c006bdf0>] (handle_IRQ_event+0x0/0x190) from [<c006d5f4>] > (handle_edge_irq+0xe4/0x1dc) > r9:c0379a94 r8:c03be09c r7:00000073 r6:cf9e3220 r5:c0365304 > r4:cfaee000 > [<c006d510>] (handle_edge_irq+0x0/0x1dc) from [<c002f07c>] > (pxa_gpio_demux_handler+0xa8/0xd8) > r9:c0379a94 r8:cfaeff50 r7:c03639dc r6:f6e00000 r5:00000000 > r4:00000033 > [<c002efd4>] (pxa_gpio_demux_handler+0x0/0xd8) from [<c0023044>] > (__exception_text_start+0x44/0x5c) > [<c0023000>] (__exception_text_start+0x0/0x5c) from [<c0023bec>] > (__irq_usr+0x4c/0xe0) > Exception stack(0xcfaeffb0 to 0xcfaefff8) > ffa0: 00000006 2a00d792 00000006 > 2a00d792 > ffc0: 00000190 00000000 2a012f48 00000000 2a010228 2a014c48 00000000 > 000000be > ffe0: 2a010374 bef95618 2a0025e0 400e7fd0 20000010 ffffffff > r7:00000001 r6:00000400 r5:00000000 r4:ffffffff > ---[ end trace fa47280d47db3eae ]--- > sda1 > sd 0:0:0:0: [sda] Attached SCSI removable disk -- Lei Ming -- 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
