diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2012-04-23 13:54:36 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-23 12:05:44 -0700 |
| commit | 3d9545cc375d117554a9b35dfddadf9189c62775 (patch) | |
| tree | b01707d2e0901665f20bae0f0c5a0930af69651a /drivers/usb/host/ehci-hub.c | |
| parent | 09091a4d5f2dd378dcf71de50b48cdacc58a8ac0 (diff) | |
EHCI: maintain the ehci->command value properly
The ehci-hcd driver is a little haphazard about keeping track of the
state of the USBCMD register. The ehci->command field is supposed to
hold the register's value (apart from a few special bits) at all
times, but it isn't maintained properly.
This patch (as1543) cleans up the situation. It keeps ehci->command
up-to-date, and uses that value rather than reading the register from
the hardware whenever possible.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 402e766df2fe..fc9e7cc6ac9b 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -233,7 +233,6 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) /* stop schedules, clean any completed work */ if (ehci->rh_state == EHCI_RH_RUNNING) ehci_quiesce (ehci); - ehci->command = ehci_readl(ehci, &ehci->regs->command); ehci_work(ehci); /* Unlike other USB host controller types, EHCI doesn't have @@ -374,6 +373,7 @@ static int ehci_bus_resume (struct usb_hcd *hcd) ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); /* restore CMD_RUN, framelist size, and irq threshold */ + ehci->command |= CMD_RUN; ehci_writel(ehci, ehci->command, &ehci->regs->command); ehci->rh_state = EHCI_RH_RUNNING; |