Re: [PATCH 4.4 068/134] usb: dwc2: Make sure we disconnect the gadget state
On Sun, Apr 01, 2018 at 04:49:45PM +0100, Ben Hutchings wrote: > On Mon, 2018-03-19 at 19:05 +0100, Greg Kroah-Hartman wrote: > > 4.4-stable review patch. If anyone has any objections, please let me know. > > > > -- > > > > From: John Stultz > > > > > > [ Upstream commit dad3f793f20fbb5c0c342f0f5a0bdf69a4d76089 ] > > Maybe we should also have: > > commit d2471d4a24dfbff5e463d382e2c6fec7d7e25a09 > Author: John Stultz > Date: Mon Oct 23 14:32:48 2017 -0700 > > usb: dwc2: Improve gadget state disconnection handling Good idea, now queued up. greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 4.4 068/134] usb: dwc2: Make sure we disconnect the gadget state
On Mon, 2018-03-19 at 19:05 +0100, Greg Kroah-Hartman wrote: > 4.4-stable review patch. If anyone has any objections, please let me know. > > -- > > From: John Stultz > > > [ Upstream commit dad3f793f20fbb5c0c342f0f5a0bdf69a4d76089 ] Maybe we should also have: commit d2471d4a24dfbff5e463d382e2c6fec7d7e25a09 Author: John Stultz Date: Mon Oct 23 14:32:48 2017 -0700 usb: dwc2: Improve gadget state disconnection handling Ben. > I had seen some odd behavior with HiKey's usb-gadget interface > that I finally seemed to have chased down. Basically every other > time I plugged in the OTG port, the gadget interface would > properly initialize. The other times, I'd get a big WARN_ON > in dwc2_hsotg_init_fifo() about the fifo_map not being clear. > > Ends up if we don't disconnect the gadget state, the fifo-map > doesn't get cleared properly, which causes WARN_ON messages and > also results in the device not properly being setup as a gadget > every other time the OTG port is connected. > > So this patch adds a call to dwc2_hsotg_disconnect() in the > reset path so the state is properly cleared. > > With it, the gadget interface initializes properly on every > plug in. > > Cc: Wei Xu > Cc: Guodong Xu > Cc: Amit Pundir > Cc: Rob Herring > Cc: John Youn > Cc: Douglas Anderson > Cc: Chen Yu > Cc: Felipe Balbi > Cc: Greg Kroah-Hartman > Cc: linux-usb@vger.kernel.org > Acked-by: John Youn > Signed-off-by: John Stultz > Signed-off-by: Felipe Balbi > Signed-off-by: Sasha Levin > Signed-off-by: Greg Kroah-Hartman > --- > drivers/usb/dwc2/hcd.c |1 + > 1 file changed, 1 insertion(+) > > --- a/drivers/usb/dwc2/hcd.c > +++ b/drivers/usb/dwc2/hcd.c > @@ -1385,6 +1385,7 @@ static void dwc2_conn_id_status_change(s > dwc2_core_init(hsotg, false, -1); > dwc2_enable_global_interrupts(hsotg); > spin_lock_irqsave(&hsotg->lock, flags); > + dwc2_hsotg_disconnect(hsotg); > dwc2_hsotg_core_init_disconnected(hsotg, false); > spin_unlock_irqrestore(&hsotg->lock, flags); > dwc2_hsotg_core_connect(hsotg); -- Ben Hutchings Software Developer, Codethink Ltd. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH 4.4 068/134] usb: dwc2: Make sure we disconnect the gadget state
4.4-stable review patch. If anyone has any objections, please let me know. -- From: John Stultz [ Upstream commit dad3f793f20fbb5c0c342f0f5a0bdf69a4d76089 ] I had seen some odd behavior with HiKey's usb-gadget interface that I finally seemed to have chased down. Basically every other time I plugged in the OTG port, the gadget interface would properly initialize. The other times, I'd get a big WARN_ON in dwc2_hsotg_init_fifo() about the fifo_map not being clear. Ends up if we don't disconnect the gadget state, the fifo-map doesn't get cleared properly, which causes WARN_ON messages and also results in the device not properly being setup as a gadget every other time the OTG port is connected. So this patch adds a call to dwc2_hsotg_disconnect() in the reset path so the state is properly cleared. With it, the gadget interface initializes properly on every plug in. Cc: Wei Xu Cc: Guodong Xu Cc: Amit Pundir Cc: Rob Herring Cc: John Youn Cc: Douglas Anderson Cc: Chen Yu Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Acked-by: John Youn Signed-off-by: John Stultz Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc2/hcd.c |1 + 1 file changed, 1 insertion(+) --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -1385,6 +1385,7 @@ static void dwc2_conn_id_status_change(s dwc2_core_init(hsotg, false, -1); dwc2_enable_global_interrupts(hsotg); spin_lock_irqsave(&hsotg->lock, flags); + dwc2_hsotg_disconnect(hsotg); dwc2_hsotg_core_init_disconnected(hsotg, false); spin_unlock_irqrestore(&hsotg->lock, flags); dwc2_hsotg_core_connect(hsotg); -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
