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USB: serial: only process sysrq when enabled

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Do not set the sysrq timestamp unless CONFIG_MAGIC_SYSRQ is enabled to
avoid unnecessary per-character processing for consoles.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2020-07-08 14:49:55 +02:00
parent 37ae231554
commit 8c6a223186
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/serial/generic.c
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@ -594,7 +594,7 @@ EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char);
int usb_serial_handle_break(struct usb_serial_port *port)
{
if (!port->port.console)
if (!port->port.console || !IS_ENABLED(CONFIG_MAGIC_SYSRQ))
return 0;
if (!port->sysrq) {