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usb: xhci: Disable slot even when virt-dev is null

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xhci_disable_slot() is a helper for disabling a slot when a device
goes away or recovers from error situations. Currently, it checks
the corespoding virt-dev pointer and returns directly (w/o issuing
disable slot command) if it's null.

This is unnecessary and will cause problems in case where virt-dev
allocation fails and xhci_disable_slot() is called to roll back the
hardware state. Refer to the implementation of xhci_alloc_dev().

This patch removes lines to check virt-dev in xhci_disable_slot().

Fixes: f9e609b824 ("usb: xhci: Add helper function xhci_disable_slot().")
Cc: Guoqing Zhang <guoqing.zhang@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lu Baolu
2017-10-05 11:21:40 +03:00
committed by Greg Kroah-Hartman
parent 02b6fdc2a1
commit b64149ca01
2 changed files with 3 additions and 4 deletions
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3
drivers/usb/host/xhci-hub.c
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@ -612,6 +612,9 @@ static int xhci_enter_test_mode(struct xhci_hcd *xhci,
xhci_dbg(xhci, "Disable all slots\n");
spin_unlock_irqrestore(&xhci->lock, *flags);
for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) {
if (!xhci->devs[i])
continue;
retval = xhci_disable_slot(xhci, NULL, i);
if (retval)
xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",