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authorDmitry Torokhov <dtor@vmware.com>2013-02-25 10:56:01 -0800
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2013-03-18 08:25:13 -0700
commitf8264340e694604863255cc0276491d17c402390 (patch)
tree5d98d5c4bec3fb3e014e77204b68430a3e99e9a8 /drivers/usb
parent2a40f324541ee61c22146214349c2ce9f5c30bcf (diff)
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 <dtor@vmware.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/xhci.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index f791bd0aee6c..2c510e4a7d4c 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. */