From: Felipe Balbi <balbi@xxxxxx>
3.4.105-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit fed33afce0eda44a46ae24d93aec1b5198c0bac4 upstream.
Currently, we disable pm_runtime before all register
accesses are done, this is dangerous and might lead
to abort exceptions due to the driver trying to access
a register which is clocked by a clock which was long
gated.
Fix that by moving pm_runtime_put_sync() and pm_runtime_disable()
as the last thing we do before returning from our ->remove()
method.
Fixes: 72246da (usb: Introduce DesignWare USB3 DRD Driver)
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
---
drivers/usb/dwc3/core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 99b58d84..6da4435 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -563,9 +563,6 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pm_runtime_put(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
-
dwc3_debugfs_exit(dwc);
switch (dwc->mode) {
@@ -586,6 +583,9 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
dwc3_core_exit(dwc);
+ pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
return 0;
}
--
1.9.1
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