On Wed, Jul 02, 2014 at 01:58:18AM -0700, Chen, Alvin wrote: > From: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxx> > > The EHCI packet buffer in/out threshold is programmable for Intel Quark X1000 > USB host controller, and the default value is 0x20 dwords. The in/out threshold > can be programmed to 0x80 dwords (512 Bytes) to maximize the perfomrance, > but only when isochronous/interrupt transactions are not initiated by the USB > host controller. This patch is to reconfigure the packet buffer in/out > threshold as maximal as possible to maximize the performance, and 0x7F dwords > (508 Bytes) should be used because the USB host controller initiates > isochronous/interrupt transactions. > > Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxx> > Signed-off-by: Alvin (Weike) Chen <alvin.chen@xxxxxxxxx> > Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > Reviewed-by: Jingoo Han <jg1.han@xxxxxxxxxxx> > --- > Changlog v5: > * Correct the wrong comment style. > > drivers/usb/host/ehci-pci.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+) This should go to stable kernel releases as well, right? thanks, greg k-h -- 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
