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[PATCH] USB: ehci.patch (earlier irq disable)

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This tweaks the EHCI reboot notifier to also halt the EHCI controller, and
makes that halt code force IRQs off.  Both should always have been done.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/usb/host/ehci-hcd.c |    8 ++++++++
 1 file changed, 8 insertions(+)
This commit is contained in:
David Brownell 2005-09-27 10:19:39 -07:00 committed by Greg Kroah-Hartman
parent 7efe5d7c3e
commit 72f30b6f2f
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/host/ehci-hcd.c
View file

@ -182,6 +182,9 @@ static int ehci_halt (struct ehci_hcd *ehci)
{
u32 temp = readl (&ehci->regs->status);
/* disable any irqs left enabled by previous code */
writel (0, &ehci->regs->intr_enable);
if ((temp & STS_HALT) != 0)
return 0;
@ -335,12 +338,17 @@ static int bios_handoff (struct ehci_hcd *ehci, int where, u32 cap)
#endif
/* Reboot notifiers kick in for silicon on any bus (not just pci, etc).
* This forcibly disables dma and IRQs, helping kexec and other cases
* where the next system software may expect clean state.
*/
static int
ehci_reboot (struct notifier_block *self, unsigned long code, void *null)
{
struct ehci_hcd *ehci;
ehci = container_of (self, struct ehci_hcd, reboot_notifier);
(void) ehci_halt (ehci);
/* make BIOS/etc use companion controller during reboot */
writel (0, &ehci->regs->configured_flag);