USB: dwc3_msm: Disable all events before error recovery for Erratic event

Currently as part of Erratic event handling, dumping all relevant registers
and then scheduling work for block reset. This does lead to erratic event
getting fired continuously and might result in watchdog crash. Hence
disable all events in DEVTEN regiser before doing block reset and reenable
the events once block reset is completed.

Change-Id: Ib2644ea8471cb87792a9524dc5103b61b2d0a74c
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
usb: gadget: enabled support to LPM
USB: EHCI: fix crash during suspend on ASUS computers

This patch (as1545) fixes a problem affecting several ASUS computers:
The machine crashes or corrupts memory when going into suspend if the
ehci-hcd driver is bound to any controllers.  Users have been forced
to unbind or unload ehci-hcd before putting their systems to sleep.

After extensive testing, it was determined that the machines don't
like going into suspend when any EHCI controllers are in the PCI D3
power state.  Presumably this is a firmware bug, but there's nothing
we can do about it except to avoid putting the controllers in D3
during system sleep.

The patch adds a new flag to indicate whether the problem is present,
and avoids changing the controller's power state if the flag is set.
Runtime suspend is unaffected; this matters only for system suspend.
However as a side effect, the controller will not respond to remote
wakeup requests while the system is asleep.  Hence USB wakeup is not
functional -- but of course, this is already true in the current state
of affairs.

This fixes Bugzilla #42728.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Andrey Rahmatullin <wrar@wrar.name>
Tested-by: Oleksij Rempel (fishor) <bug-track@fisher-privat.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: ehci-msm-hsic: avoid double free of platform data

When device tree is enabled, the platform data structure is allocated
via devm_kzalloc and assigned it to pdev->dev.platform_data. This
memory is freed twice during platform device unregistration in
devres_release_all() and platform_device_release() functions. Assign
pdev->dev.platform_data to NULL in device driver remove method to
avoid this double free.

Change-Id: I713e0fa97e00124166a727718c0a31ab5e2c2d3b
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
usb: core: Limit HCD old enumeration scheme request to root ports

HCD_OLD_ENUM HCD flag is introduced to use old (or short) enumeration
scheme for the devices attached on the corresponding USB bus. The old
enumeration scheme is used by the MSM HSIC controller to avoid multiple
reset during enumeration. This is useful when a known device is attached
to the USB bus, which is the case with MSM HSIC. When a HSIC HUB is
connected, any device can be connected on the HSIC USB bus. The new
enumeration scheme supports wide variety of USB devices. Hence limit
the old enumeration scheme request of a HCD to only root ports.

Change-Id: I6035c2a766787819eb8d0e1fa774e0c79d6e958b
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>