USB: xhci: Wait for controller to be ready after reset.

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commit 2d62f3eea9 upstream.

After software resets an xHCI host controller, it must wait for the
"Controller Not Ready" (CNR) bit in the status register to be cleared.
Software is not supposed to ring any doorbells or write to any registers
except the status register until this bit is cleared.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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Sarah Sharp 2010-05-24 13:25:15 -07:00 • committed by Greg Kroah-Hartman

parent cf86414c11

commit 2e6aac9058

1 changed files with 12 additions and 1 deletions

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drivers/usb/host/xhci.c

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