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xhci: clear extra bits from slot context when setting max exit latency 

If we need to change the max exit latency with a Evaluate Context
command, we copy the old output slot context and use it as input
context for the command. This also copies the dev_state bits which
are supposed to be zero in the input slot context.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2014-11-27 18:19:15 +02:00 committed by Greg Kroah-Hartman
parent 69defe04ec
commit 4801d4ea55
1 changed files with 1 additions and 0 deletions
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drivers/usb/host/xhci.c
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@ -4009,6 +4009,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,
slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx);
slot_ctx->dev_info2 &= cpu_to_le32(~((u32) MAX_EXIT));
slot_ctx->dev_info2 |= cpu_to_le32(max_exit_latency);
slot_ctx->dev_state = 0;
xhci_dbg_trace(xhci, trace_xhci_dbg_context_change,
"Set up evaluate context for LPM MEL change.");