Re: [PATCH] usb: gadget: zero: Fix SuperSpeed enumeration for alternate setting 1

[Sergei Shtylyov]

Hello.

On 26-03-2014 13:28, Roger Quadros wrote:

> It was impossible to enumerate on a SuperSpeed (XHCI) host
> with alternate setting = 1 due to the wrongly set 'bMaxBurst'
> field in the SuperSpeed Endpoint Companion descriptor.

> Testcase:
> <host> modprobe -r usbtest; modprobe usbtest alt=1
> <device> modprobe g_zero
> plug device to SuperSpeed port on the host.

> Without this patch the host always complains like so
> "usb 12-2: Not enough bandwidth for new device state.
>   usb 12-2: Not enough bandwidth for altsetting 1"

> Bug was introduced by commit cf9a08ae in v3.9

   Please also specify that commit's summary in parens. Also, there's now an 
adopted standard way of saying this:

Fixes: <12-digit SHA ID> ("<summary line>")

> Cc: 3.9+ <stable@xxxxxxxxxxxxxxx> # 3.9+
> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Reviewed-by: Felipe Balbi <balbi@xxxxxx>
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>

WBR, Sergei


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