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Even though the IP supports Descriptor DMA mode, it does not support SPLIT
transactions in this mode. So the driver, in its currently form, will not
support LS/FS devices when connected to a HS Hub if Descriptor DMA mode is
enabled.
So we should just default to disable descriptor dma mode.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add usb_disabled() check to prevent kernel oops when booting with "nousb"
in the cmdline:
Unable to handle kernel NULL pointer dereference at virtual address 00000030
...
PC is at bus_add_device+0xe0/0x18c
LR is at device_add_groups+0x1c/0x20
...
[<c02191c0>] (bus_add_device) from [<c0217130>] (device_add+0x41c/0x538)
[<c0217130>] (device_add) from [<c023b1d4>] (usb_new_device+0x270/0x35c)
[<c023b1d4>] (usb_new_device) from [<c0241174>] (usb_add_hcd+0x4fc/0x760)
[<c0241174>] (usb_add_hcd) from [<c0254ce0>] (dwc2_hcd_init+0x434/0x510)
[<c0254ce0>] (dwc2_hcd_init) from [<c02594f4>] (dwc2_driver_probe+0x130/0x170)
[<c02594f4>] (dwc2_driver_probe) from [<c021bbd0>] (platform_drv_probe+0x28/0x58)
Signed-off-by: Andre Heider <a.heider@gmail.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The DWC2 driver should now be in good enough shape to move out of
staging. I have stress tested it overnight on RPI running mass
storage and Ethernet transfers in parallel, and for several days
on our proprietary PCI-based platform.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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