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authorMinas Harutyunyan <minas.harutyunyan@synopsys.com>2018-12-10 18:09:32 +0400
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-12-11 15:42:39 +0200
commit4fe4f9fecc36956fd53c8edf96dd0c691ef98ff9 (patch)
tree037c33072a1b0e53e82f69db271110725b1f844d /drivers/usb/dwc2
parent244add8ebfb231c39db9e33b204bd0ce8f24f782 (diff)
downloadlinux-4fe4f9fecc36956fd53c8edf96dd0c691ef98ff9.tar.bz2
usb: dwc2: Fix disable all EP's on disconnect
Disabling all EP's allow to reset EP's to initial state. Introduced new function dwc2_hsotg_ep_disable_lock() which before calling dwc2_hsotg_ep_disable() function acquire hsotg->lock and release on exiting. From dwc2_hsotg_ep_disable() function removed acquiring hsotg->lock. In dwc2_hsotg_core_init_disconnected() function when USB reset interrupt asserted disabling all ep’s by dwc2_hsotg_ep_disable() function. This updates eliminating sparse imbalance warnings. Reverted changes in dwc2_hostg_disconnect() function. Introduced new function dwc2_hsotg_ep_disable_lock(). Changed dwc2_hsotg_ep_ops. Now disable point to dwc2_hsotg_ep_disable_lock() function. In functions dwc2_hsotg_udc_stop() and dwc2_hsotg_suspend() dwc2_hsotg_ep_disable() function replaced by dwc2_hsotg_ep_disable_lock() function. In dwc2_hsotg_ep_disable() function removed acquiring of hsotg->lock. Fixes: dccf1bad4be7 ("usb: dwc2: Disable all EP's on disconnect") Signed-off-by: Minas Harutyunyan <hminas@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/gadget.c41
1 files changed, 23 insertions, 18 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 94f3ba995580..68ad75a7460d 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3165,8 +3165,6 @@ static void kill_all_requests(struct dwc2_hsotg *hsotg,
dwc2_hsotg_txfifo_flush(hsotg, ep->fifo_index);
}
-static int dwc2_hsotg_ep_disable(struct usb_ep *ep);
-
/**
* dwc2_hsotg_disconnect - disconnect service
* @hsotg: The device state.
@@ -3188,9 +3186,11 @@ void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg)
/* all endpoints should be shutdown */
for (ep = 0; ep < hsotg->num_of_eps; ep++) {
if (hsotg->eps_in[ep])
- dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
+ kill_all_requests(hsotg, hsotg->eps_in[ep],
+ -ESHUTDOWN);
if (hsotg->eps_out[ep])
- dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
+ kill_all_requests(hsotg, hsotg->eps_out[ep],
+ -ESHUTDOWN);
}
call_gadget(hsotg, disconnect);
@@ -3234,6 +3234,7 @@ static void dwc2_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic)
GINTSTS_PTXFEMP | \
GINTSTS_RXFLVL)
+static int dwc2_hsotg_ep_disable(struct usb_ep *ep);
/**
* dwc2_hsotg_core_init - issue softreset to the core
* @hsotg: The device state
@@ -4069,10 +4070,8 @@ static int dwc2_hsotg_ep_disable(struct usb_ep *ep)
struct dwc2_hsotg *hsotg = hs_ep->parent;
int dir_in = hs_ep->dir_in;
int index = hs_ep->index;
- unsigned long flags;
u32 epctrl_reg;
u32 ctrl;
- int locked;
dev_dbg(hsotg->dev, "%s(ep %p)\n", __func__, ep);
@@ -4088,10 +4087,6 @@ static int dwc2_hsotg_ep_disable(struct usb_ep *ep)
epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
- locked = spin_is_locked(&hsotg->lock);
- if (!locked)
- spin_lock_irqsave(&hsotg->lock, flags);
-
ctrl = dwc2_readl(hsotg, epctrl_reg);
if (ctrl & DXEPCTL_EPENA)
@@ -4114,12 +4109,22 @@ static int dwc2_hsotg_ep_disable(struct usb_ep *ep)
hs_ep->fifo_index = 0;
hs_ep->fifo_size = 0;
- if (!locked)
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
return 0;
}
+static int dwc2_hsotg_ep_disable_lock(struct usb_ep *ep)
+{
+ struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
+ struct dwc2_hsotg *hsotg = hs_ep->parent;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+ ret = dwc2_hsotg_ep_disable(ep);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return ret;
+}
+
/**
* on_list - check request is on the given endpoint
* @ep: The endpoint to check.
@@ -4267,7 +4272,7 @@ static int dwc2_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value)
static const struct usb_ep_ops dwc2_hsotg_ep_ops = {
.enable = dwc2_hsotg_ep_enable,
- .disable = dwc2_hsotg_ep_disable,
+ .disable = dwc2_hsotg_ep_disable_lock,
.alloc_request = dwc2_hsotg_ep_alloc_request,
.free_request = dwc2_hsotg_ep_free_request,
.queue = dwc2_hsotg_ep_queue_lock,
@@ -4407,9 +4412,9 @@ static int dwc2_hsotg_udc_stop(struct usb_gadget *gadget)
/* all endpoints should be shutdown */
for (ep = 1; ep < hsotg->num_of_eps; ep++) {
if (hsotg->eps_in[ep])
- dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
+ dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep);
if (hsotg->eps_out[ep])
- dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
+ dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep);
}
spin_lock_irqsave(&hsotg->lock, flags);
@@ -4857,9 +4862,9 @@ int dwc2_hsotg_suspend(struct dwc2_hsotg *hsotg)
for (ep = 0; ep < hsotg->num_of_eps; ep++) {
if (hsotg->eps_in[ep])
- dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
+ dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep);
if (hsotg->eps_out[ep])
- dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
+ dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep);
}
}