| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 105/158] usb: gadget: zero: Fix SuperSpeed enumeration for alternate setting 1 | Date | Sun, 4 May 2014 11:40:14 -0400 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Roger Quadros <rogerq@ti.com>
commit 9c1b70361e0b38e4acb8e62b54da66538cb77ff2 upstream.
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
Fixes: cf9a08ae5aec (usb: gadget: convert source sink and loopback to new function interface)
Reviewed-by: Felipe Balbi <balbi@ti.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/gadget/zero.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/gadget/zero.c +++ b/drivers/usb/gadget/zero.c @@ -300,7 +300,7 @@ static int __init zero_bind(struct usb_c ss_opts->isoc_interval = gzero_options.isoc_interval; ss_opts->isoc_maxpacket = gzero_options.isoc_maxpacket; ss_opts->isoc_mult = gzero_options.isoc_mult; - ss_opts->isoc_maxburst = gzero_options.isoc_maxpacket; + ss_opts->isoc_maxburst = gzero_options.isoc_maxburst; ss_opts->bulk_buflen = gzero_options.bulk_buflen; func_ss = usb_get_function(func_inst_ss);
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