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authorAlan Stern <stern@rowland.harvard.edu>2005-12-16 11:09:01 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-16 11:25:25 -0800
commit42245e65f356ed54fdf7a1f9a0095e0bc40f73a3 (patch)
treed094f197975af7ef7b80006dbea0f5d38915f88b /drivers
parent42f3ab42875a52af7e711803bfb8d8d7cca84c1c (diff)
[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 <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/host/uhci-hcd.c2
1 files changed, 2 insertions, 0 deletions
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;