On 19 May 2016 at 05:12, Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> wrote: > This patch protects system from crashing at shutdown in > cases where usb host is not added yet from OTG controller driver. > As ehci_setup() not done yet, so stop accessing registers or > variables initialized as part of ehci_setup(). > > The use case is simple, for boards like DB410c where the usb host > or device functionality is decided based on the micro-usb cable > presence. If the board boots up with micro-usb connected, the > OTG driver like echi-msm would not add the usb host by default. > However a system shutdown would go and access registers and > uninitialized variables, resulting in below crash. Works great. Tested-by: Andy Gross <andy.gross@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
