From: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx> Mask off the lower 16 bits of the interrupt control register, instead of masking off the upper 16 bits. The interrupt moderation interval field is the lower 16 bytes, and is set to 0x4000 (1ms) by default. The previous code was adding 40 us to the default value, instead of setting it to 40 us. This makes performance really bad. Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> --- drivers/usb/host/xhci-hcd.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c index 59ee61d..489657c 100644 --- a/drivers/usb/host/xhci-hcd.c +++ b/drivers/usb/host/xhci-hcd.c @@ -384,7 +384,7 @@ int xhci_run(struct usb_hcd *hcd) xhci_dbg(xhci, "// Set the interrupt modulation register\n"); temp = xhci_readl(xhci, &xhci->ir_set->irq_control); - temp &= 0xffff; + temp &= ~ER_IRQ_INTERVAL_MASK; temp |= (u32) 160; xhci_writel(xhci, temp, &xhci->ir_set->irq_control); -- 1.6.3.2 -- 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
