AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

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

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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);