Re: [PATCH 2/2] usb/dummy_hcd: add sg support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Alan Stern | 2011-11-04 13:24:58 [-0400]:

>On Fri, 4 Nov 2011, Sebastian Andrzej Siewior wrote:
>
>> This patch adds sg support to dummy_hcd. It seems that uas is not able
>> to work with a hcd which does not support sg only based transfers.
>
>While I'm not opposed in principle to adding SG support to dummy-hcd,
>it might make more sense in this case to fix the UAS driver.  After
>all, there's no rule that UAS devices have to run at SuperSpeed.  This
>means that a UAS device could be plugged in under any host controller,
>and the driver ought to be able to handle it.

ehci supports sg others may not. So fixing uas would mean we should add
something like usb_sg_init() (which seems to handle sgs) into
uas_alloc_data_urb(). So we get better support and miss only the highmem
case.

>Alan Stern

Sebastian
--
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


[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux