[73/74] usb: chipidea: Allow disabling streaming not only in udc mode

Message ID 1358998046-613-74-git-send-email-herton.krzesinski@canonical.com
State New
Headers show

Commit Message

Herton Ronaldo Krzesinski Jan. 24, 2013, 3:27 a.m. -stable review patch.  If anyone has any objections, please let me know.


From: Fabio Estevam <fabio.estevam@freescale.com>

commit 929473ea05db455ad88cdc081f2adc556b8dc48f upstream.

When running a scp transfer using a USB/Ethernet adapter the following crash

$ scp test.tar.gz fabio@
fabio@'s password:
test.tar.gz                                      0%    0     0.0KB/s   --:-- ETA
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x2cc/0x2f0()
NETDEV WATCHDOG: eth0 (asix): transmit queue 0 timed out
Modules linked in:
[<80011c94>] (dump_backtrace+0x0/0x10c) from [<804d3a5c>] (dump_stack+0x18/0x1c)
 r6:000000ff r5:80412388 r4:80685dc0 r3:80696cc0
[<804d3a44>] (dump_stack+0x0/0x1c) from [<80021868>]
[<80021814>] (warn_slowpath_common+0x0/0x6c) from [<80021924>]

Setting SDIS (Stream Disable Mode- bit 4 of USBMODE register) fixes the problem.

However, in current code CI13XXX_DISABLE_STREAMING flag is only set in udc mode,
so allow disabling streaming also in host mode.

Tested on a mx6qsabrelite board.

Suggested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ herton: ci->platdata->flags is ci->udc_driver->flags on 3.5 ]
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
 drivers/usb/chipidea/host.c |    3 +++
 1 file changed, 3 insertions(+)


diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 9eacd21..2400d18 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -128,6 +128,9 @@  static int host_start(struct ci13xxx *ci)
 		ci->hcd = hcd;
+	if (ci->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
 	return ret;