On Thursday, April 09, 2015 at 05:27:49 AM, Stephen Warren wrote:
> When fetching the first descriptor from a new device, only validate that
> we received at least 8 bytes, not that we received the entire descriptor.
> The reasoning is:
> - The code only uses fields in the first 8 bytes, so that's all we need
> to have fetched at this stage.
> - The smallest maxpacket size is 8 bytes. Before we know the actual
> maxpacket the device uses, the USB controller may only accept a single
> packet (see the DWC2 note in the comment added in the commit).
> Consequently we are only guaranteed to receive 1 packet (at least 8
> bytes) even in a non-error case.
>
> Fixes: 1a7758044b04 ("usb: Early failure when the first descriptor read
> fails or is invalid")
> Cc: Paul Kocialkowski <[email protected]>
> Signed-off-by: Stephen Warren <[email protected]>
Applied to u-boot-usb/next, thanks!
Best regards,
Marek Vasut
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