From: Stephen Warren <swarren@nvidia.com>
Date: Wed, 18 Apr 2012 21:32:46 +0000 (-0600)
Subject: USB: EHCI: remove PORT_RWC_BITS when clearing USB_PORT_FEAT_ENABLE
X-Git-Tag: v3.5-rc1~149^2~328^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d5f89c7b4fa5f8d6dc757982402c032183ffd8d;p=pandora-kernel.git

USB: EHCI: remove PORT_RWC_BITS when clearing USB_PORT_FEAT_ENABLE

In the ClearPortFeature/USB_PORT_FEAT_ENABLE case, ehci_hub_control()
would read from status_reg, clear PORT_PE, and write the result back to
status_reg. This would clear any bits in PORT_RWC_BITS that were set in
the registers. Fix this by masking these bits off before the write.

Since this masking is common across all ClearPortFeature cases, move it
into a single early location to avoid duplicating it.

Remove the same bugfix from ehci-tegra.c's tegra_ehci_hub_control(), now
that this case is correctly handled by the core.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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