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path: root/drivers/usb/dwc3
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-rw-r--r--drivers/usb/dwc3/core.c8
-rw-r--r--drivers/usb/dwc3/dwc3-omap.c4
-rw-r--r--drivers/usb/dwc3/dwc3-st.c16
-rw-r--r--drivers/usb/dwc3/dwc3-xilinx.c7
-rw-r--r--drivers/usb/dwc3/ep0.c3
5 files changed, 26 insertions, 12 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 734de2a8bd21..ccc3895dbd7f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -564,9 +564,17 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc)
void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
{
struct dwc3_event_buffer *evt;
+ u32 reg;
if (!dwc->ev_buf)
return;
+ /*
+ * Exynos platforms may not be able to access event buffer if the
+ * controller failed to halt on dwc3_core_exit().
+ */
+ reg = dwc3_readl(dwc->regs, DWC3_DSTS);
+ if (!(reg & DWC3_DSTS_DEVCTRLHLT))
+ return;
evt = dwc->ev_buf;
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index d5c77db4daa9..2a11fc0ee84f 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -522,11 +522,13 @@ static int dwc3_omap_probe(struct platform_device *pdev)
if (ret) {
dev_err(dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret);
- goto err1;
+ goto err2;
}
dwc3_omap_enable_irqs(omap);
return 0;
+err2:
+ of_platform_depopulate(dev);
err1:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
index 211360eee95a..c8c7cd0c1796 100644
--- a/drivers/usb/dwc3/dwc3-st.c
+++ b/drivers/usb/dwc3/dwc3-st.c
@@ -219,10 +219,8 @@ static int st_dwc3_probe(struct platform_device *pdev)
dwc3_data->regmap = regmap;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "syscfg-reg");
- if (!res) {
- ret = -ENXIO;
- goto undo_platform_dev_alloc;
- }
+ if (!res)
+ return -ENXIO;
dwc3_data->syscfg_reg_off = res->start;
@@ -233,8 +231,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
devm_reset_control_get_exclusive(dev, "powerdown");
if (IS_ERR(dwc3_data->rstc_pwrdn)) {
dev_err(&pdev->dev, "could not get power controller\n");
- ret = PTR_ERR(dwc3_data->rstc_pwrdn);
- goto undo_platform_dev_alloc;
+ return PTR_ERR(dwc3_data->rstc_pwrdn);
}
/* Manage PowerDown */
@@ -269,7 +266,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
if (!child_pdev) {
dev_err(dev, "failed to find dwc3 core device\n");
ret = -ENODEV;
- goto err_node_put;
+ goto depopulate;
}
dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev);
@@ -285,6 +282,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
ret = st_dwc3_drd_init(dwc3_data);
if (ret) {
dev_err(dev, "drd initialisation failed\n");
+ of_platform_depopulate(dev);
goto undo_softreset;
}
@@ -294,14 +292,14 @@ static int st_dwc3_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dwc3_data);
return 0;
+depopulate:
+ of_platform_depopulate(dev);
err_node_put:
of_node_put(child);
undo_softreset:
reset_control_assert(dwc3_data->rstc_rst);
undo_powerdown:
reset_control_assert(dwc3_data->rstc_pwrdn);
-undo_platform_dev_alloc:
- platform_device_put(pdev);
return ret;
}
diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c
index bb4d894c16e9..f1298b1b4f84 100644
--- a/drivers/usb/dwc3/dwc3-xilinx.c
+++ b/drivers/usb/dwc3/dwc3-xilinx.c
@@ -327,9 +327,14 @@ static int dwc3_xlnx_probe(struct platform_device *pdev)
goto err_pm_set_suspended;
pm_suspend_ignore_children(dev, false);
- return pm_runtime_resume_and_get(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret < 0)
+ goto err_pm_set_suspended;
+
+ return 0;
err_pm_set_suspended:
+ of_platform_depopulate(dev);
pm_runtime_set_suspended(dev);
err_clk_put:
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index d96ffbe52039..c9533a99e47c 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -232,7 +232,8 @@ void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
/* stall is always issued on EP0 */
dep = dwc->eps[0];
__dwc3_gadget_ep_set_halt(dep, 1, false);
- dep->flags = DWC3_EP_ENABLED;
+ dep->flags &= DWC3_EP_RESOURCE_ALLOCATED;
+ dep->flags |= DWC3_EP_ENABLED;
dwc->delayed_status = false;
if (!list_empty(&dep->pending_list)) {