From: Felipe Balbi <balbi@ti.com>
Date: Thu, 26 Feb 2015 17:09:20 +0000 (-0600)
Subject: usb: musb: core: controller drops session automatically
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=a67cab72b87c7bb970bec8bc060a8946c5dfa1c5;p=deliverable%2Flinux.git

usb: musb: core: controller drops session automatically

Whenever babble happens, MUSB controller will
drop session automatically.

The only case where it won't drop the session,
is when we're running on AM335x and SW_SESSION_CTRL
bit has been set. In that case, controller will
not touch session bit so SW has a chance to recover
from babble condition.

Tested-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index d7730c7e7938..b86e975cba2b 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -880,7 +880,6 @@ b_host:
 			 */
 			if (power & MUSB_POWER_HSMODE) {
 				dev_err(musb->controller, "Babble\n");
-				musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 
 				if (is_host_active(musb)) {
 					musb_generic_disable(musb);