From 755d739534f998d92e348fba8ffb0478416576e7 Mon Sep 17 00:00:00 2001
From: Vardan Mikayelyan <mvardan@synopsys.com>
Date: Tue, 16 Jan 2018 16:04:24 +0400
Subject: [PATCH] usb: dwc2: Fix dwc2_hsotg_core_init_disconnected()
Git-commit: 755d739534f998d92e348fba8ffb0478416576e7
Patch-mainline: v4.16-rc3
References: bsc#1051510
We should call dwc2_hsotg_enqueue_setup() after properly
setting lx_state. Because it may cause error-out from
dwc2_hsotg_enqueue_setup() due to wrong value in lx_state.
Issue can be reproduced by loading driver while connected
A-Connector (start in A-HOST mode) then disconnect A-Connector
to switch to B-DEVICE.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/usb/dwc2/gadget.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index d6222e946463..5bcad1d869b5 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3381,12 +3381,6 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
dwc2_writel(dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) |
DXEPCTL_USBACTEP, hsotg->regs + DIEPCTL0);
- dwc2_hsotg_enqueue_setup(hsotg);
-
- dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
- dwc2_readl(hsotg->regs + DIEPCTL0),
- dwc2_readl(hsotg->regs + DOEPCTL0));
-
/* clear global NAKs */
val = DCTL_CGOUTNAK | DCTL_CGNPINNAK;
if (!is_usb_reset)
@@ -3397,6 +3391,12 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
mdelay(3);
hsotg->lx_state = DWC2_L0;
+
+ dwc2_hsotg_enqueue_setup(hsotg);
+
+ dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+ dwc2_readl(hsotg->regs + DIEPCTL0),
+ dwc2_readl(hsotg->regs + DOEPCTL0));
}
static void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
--
2.18.0