Messages in this thread Patch in this message | | | Date | Mon, 12 Dec 2005 12:01:36 -0800 | From | Greg Kroah-Hartman <> | Subject | [patch 4/4] UHCI: add missing memory barriers |
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From: Alan Stern <stern@rowland.harvard.edu>
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>
--- drivers/usb/host/uhci-hcd.c | 2 ++ 1 file changed, 2 insertions(+)
--- greg-2.6.orig/drivers/usb/host/uhci-hcd.c +++ greg-2.6/drivers/usb/host/uhci-hcd.c @@ -717,6 +717,7 @@ static int uhci_suspend(struct usb_hcd * * 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 *h * 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; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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