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| author |   Mathias Nyman <mathias.nyman@linux.intel.com> | 2020-07-23 17:45:29 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-23 17:05:29 +0200 |
| commit | 688915b11aa7f8b92d12a2e4672d71e3626a0e6a (patch) | |
| tree | 60f13d1b7ec88b88b90c48334e713e39bbdad2da /drivers/usb/host/xhci-dbgtty.c | |
| parent | xhci: dbc: Add a operations structure to access driver functions (diff) | |
| download | wireguard-linux-688915b11aa7f8b92d12a2e4672d71e3626a0e6a.tar.xz wireguard-linux-688915b11aa7f8b92d12a2e4672d71e3626a0e6a.zip | |
xhci: dbgcap: remove dbc dependency on dbctty specific flag
dbc should not be aware of, or use any dbctty specific variables.
currenly dbc driver reads the port->registered flag to see if the
callbacks should be called.
Only makes these decisions based on dbc internal state instead.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200723144530.9992-27-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-dbgtty.c')
| -rw-r--r-- | drivers/usb/host/xhci-dbgtty.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c index 3231cec74a7a..3b306a22da47 100644 --- a/drivers/usb/host/xhci-dbgtty.c +++ b/drivers/usb/host/xhci-dbgtty.c @@ -399,6 +399,9 @@ int xhci_dbc_tty_register_device(struct xhci_dbc *dbc) struct device *tty_dev; struct dbc_port *port = &dbc->port; + if (port->registered) + return -EBUSY; + xhci_dbc_tty_init_port(dbc, port); tty_dev = tty_port_register_device(&port->port, dbc_tty_driver, 0, NULL); @@ -445,6 +448,8 @@ void xhci_dbc_tty_unregister_device(struct xhci_dbc *dbc) { struct dbc_port *port = &dbc->port; + if (!port->registered) + return; tty_unregister_device(dbc_tty_driver, 0); xhci_dbc_tty_exit_port(port); port->registered = false; |