From 42245e65f356ed54fdf7a1f9a0095e0bc40f73a3 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Fri, 16 Dec 2005 11:09:01 -0800 Subject: [PATCH] [PATCH] UHCI: add missing memory barriers This patch (as617) adds a couple of memory barriers that Ben H. forgot in his recent suspend/resume fix. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds --- drivers/usb/host/uhci-hcd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c index ed550132db0b..79efaf7d86a3 100644 --- a/drivers/usb/host/uhci-hcd.c +++ b/drivers/usb/host/uhci-hcd.c @@ -717,6 +717,7 @@ static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message) * at the source, so we must turn off PIRQ. */ pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0); + mb(); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); uhci->hc_inaccessible = 1; hcd->poll_rh = 0; @@ -738,6 +739,7 @@ static int uhci_resume(struct usb_hcd *hcd) * really don't want to keep a stale HCD_FLAG_HW_ACCESSIBLE=0 */ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + mb(); if (uhci->rh_state == UHCI_RH_RESET) /* Dead */ return 0; -- 2.20.1