From f8264340e694604863255cc0276491d17c402390 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Mon, 25 Feb 2013 10:56:01 -0800 Subject: [PATCH] USB: xhci - fix bit definitions for IMAN register According to XHCI specification (5.5.2.1) the IP is bit 0 and IE is bit 1 of IMAN register. Previously their definitions were reversed. Even though there are no ill effects being observed from the swapped definitions (because IMAN_IP is RW1C and in legacy PCI case we come in with it already set to 1 so it was clearing itself even though we were setting IMAN_IE instead of IMAN_IP), we should still correct the values. This patch should be backported to kernels as old as 2.6.36, that contain the commit 4e833c0b87a30798e67f06120cecebef6ee9644c "xhci: don't re-enable IE constantly". Signed-off-by: Dmitry Torokhov Signed-off-by: Sarah Sharp Cc: stable@vger.kernel.org --- drivers/usb/host/xhci.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index f791bd0aee6cda..2c510e4a7d4c61 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -206,8 +206,8 @@ struct xhci_op_regs { /* bits 12:31 are reserved (and should be preserved on writes). */ /* IMAN - Interrupt Management Register */ -#define IMAN_IP (1 << 1) -#define IMAN_IE (1 << 0) +#define IMAN_IE (1 << 1) +#define IMAN_IP (1 << 0) /* USBSTS - USB status - status bitmasks */ /* HC not running - set to 1 when run/stop bit is cleared. */