diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2017-10-05 11:21:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-05 11:01:57 +0200 |
| commit | b64149ca016c25f30b39ac5a8f37cfb9017e19bb (patch) | |
| tree | 51042995adddbbdd720e2846b8086d630308e820 /drivers/usb/host | |
| parent | 02b6fdc2a153e61b957937772a562fb6357dc861 (diff) | |
usb: xhci: Disable slot even when virt-dev is null
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: f9e609b82479 ("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>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 3 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.c | 4 |
2 files changed, 3 insertions, 4 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index ad89a6d4111b..f0ae9df7cbef 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -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", diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index e20b2c26a3f1..5cb7c5cd4af5 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -3581,11 +3581,7 @@ int xhci_disable_slot(struct xhci_hcd *xhci, struct xhci_command *command, unsigned long flags; u32 state; int ret = 0; - struct xhci_virt_device *virt_dev; - virt_dev = xhci->devs[slot_id]; - if (!virt_dev) - return -EINVAL; if (!command) command = xhci_alloc_command(xhci, false, false, GFP_KERNEL); if (!command) |