xavi/android_kernel_m2note/drivers/usb/gadget/u_ether.c, branch ng-7.1.2

usb: gadget: u_ether: remove interrupt throttling

2017-04-11T08:58:06+00:00

commit fd9afd3cbe404998d732be6cc798f749597c5114 upstream. According to Dave Miller "the networking stack has a hard requirement that all SKBs which are transmitted must have their completion signalled in a fininte amount of time. This is because, until the SKB is freed by the driver, it holds onto socket, netfilter, and other subsystem resources." In summary, this means that using TX IRQ throttling for the networking gadgets is, at least, complex and we should avoid it for the time being. Reported-by: Ville Syrjälä Tested-by: Ville Syrjälä Suggested-by: David Miller Signed-off-by: Felipe Balbi Signed-off-by: Willy Tarreau

usb: gadget: function: u_ether: don't starve tx request queue

2017-04-11T08:58:06+00:00

commit 6c83f77278f17a7679001027e9231291c20f0d8a upstream. If we don't guarantee that we will always get an interrupt at least when we're queueing our very last request, we could fall into situation where we queue every request with 'no_interrupt' set. This will cause the link to get stuck. The behavior above has been triggered with g_ether and dwc3. Reported-by: Ville Syrjälä Signed-off-by: Felipe Balbi Signed-off-by: Willy Tarreau

first commit

2016-08-15T02:19:42+00:00