ChangeSet 1.2168, 2004/12/09 12:22:49-08:00, [EMAIL PROTECTED]
[PATCH] USB UHCI: minor bugfix for port resume
This patch fixes two small problems in the port suspend/resume handling
for the UHCI driver. There were a couple of spots where I neglected to
store I/O addresses in unsigned _long_ variables (required for 64-bit
architectures). And it turns out the host controller will continue to
indicate a resume is in progress for a few microseconds after it has been
turned off, so an extra delay is needed.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
drivers/usb/host/uhci-hub.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff -Nru a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c
--- a/drivers/usb/host/uhci-hub.c 2004-12-09 14:54:37 -08:00
+++ b/drivers/usb/host/uhci-hub.c 2004-12-09 14:54:37 -08:00
@@ -69,7 +69,7 @@
* FIXME: Synchronize access to these fields by a spinlock.
*/
static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
- unsigned int port_addr)
+ unsigned long port_addr)
{
int status;
@@ -78,13 +78,19 @@
clear_bit(port, &uhci->suspended_ports);
clear_bit(port, &uhci->resuming_ports);
set_bit(port, &uhci->port_c_suspend);
+
+ /* The controller won't actually turn off the RD bit until
+ * it has had a chance to send a low-speed EOP sequence,
+ * which takes 3 bit times (= 2 microseconds). We'll delay
+ * slightly longer for good luck. */
+ udelay(4);
}
}
static void uhci_check_resume(struct uhci_hcd *uhci)
{
unsigned int port;
- unsigned int port_addr;
+ unsigned long port_addr;
for (port = 0; port < uhci->rh_numports; ++port) {
port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
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