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Adding cmd_ring_state for command ring. It helps to verify the current command ring state for controlling the command ring operations. This patch should be backported to kernels as old as 3.0. The commit 7ed603e "xhci: Add an assertion to check for virt_dev=0 bug." papers over the NULL pointer dereference that I now believe is related to a timed out Set Address command. This (and the four patches that follow it) contain the real fix that also allows VIA USB 3.0 hubs to consistently re-enumerate during the plug/unplug stress tests. Signed-off-by: Elric Fu <elricfu1@gmail.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Miroslav Sabljic <miroslav.sabljic@avl.com> Cc: stable@vger.kernel.org
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Elric Fu
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Sarah Sharp
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Sep 13, 2012
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