---

yaml --- r: 36418 b: refs/heads/master c: de06a3b h: refs/heads/master v: v3
git-mirror · Sep 27, 2006 · 519008c · 519008c
1 parent 3b2284d
commit 519008c
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Showing 2 changed files with 10 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 64a21d025d3a979a8715f2ec7acabca7b5406c8a
+refs/heads/master: de06a3b842b31b31220637c869f112cfbc1a5ef6
diff --git a/trunk/drivers/usb/host/uhci-hub.c b/trunk/drivers/usb/host/uhci-hub.c
@@ -84,6 +84,7 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
 		unsigned long port_addr)
 {
 	int status;
+	int i;
 
 	if (inw(port_addr) & (USBPORTSC_SUSP | USBPORTSC_RD)) {
 		CLR_RH_PORTSTAT(USBPORTSC_SUSP | USBPORTSC_RD);
@@ -92,9 +93,14 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
 
 		/* 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);
+		 * which is supposed to take 3 bit times (= 2 microseconds).
+		 * Experiments show that some controllers take longer, so
+		 * we'll poll for completion. */
+		for (i = 0; i < 10; ++i) {
+			if (!(inw(port_addr) & USBPORTSC_RD))
+				break;
+			udelay(1);
+		}
 	}
 	clear_bit(port, &uhci->resuming_ports);
 }