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usb: dwc2: fix memory corruption in dwc2 driver
The move from the staging tree to the main tree exposed a longstanding memory corruption bug in the dwc2 driver. The reordering of the driver initialization caused the dwc2 driver to corrupt the initialization data of the sdhci driver on the Raspberry Pi platform, which made the bug show up. The error is in calling to_usb_device(hsotg->dev), since ->dev is not a member of struct usb_device. The easiest fix is to just remove the offending code, since it is not really needed. Thanks to Stephen Warren for tracking down the cause of this. Reported-by: Andre Heider <a.heider@gmail.com> Tested-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 0 additions and 11 deletions
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@ -2565,25 +2565,14 @@ static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep)
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{
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struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
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int is_control = usb_endpoint_xfer_control(&ep->desc);
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int is_out = usb_endpoint_dir_out(&ep->desc);
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int epnum = usb_endpoint_num(&ep->desc);
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struct usb_device *udev;
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unsigned long flags;
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dev_dbg(hsotg->dev,
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"DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n",
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ep->desc.bEndpointAddress);
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udev = to_usb_device(hsotg->dev);
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spin_lock_irqsave(&hsotg->lock, flags);
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usb_settoggle(udev, epnum, is_out, 0);
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if (is_control)
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usb_settoggle(udev, epnum, !is_out, 0);
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dwc2_hcd_endpoint_reset(hsotg, ep);
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spin_unlock_irqrestore(&hsotg->lock, flags);
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}
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