From 46ecc9d54efc11bf99689901f867854d264cbc0b Mon Sep 17 00:00:00 2001 From: Guido Kiener Date: Wed, 12 Sep 2018 10:50:55 +0200 Subject: usb: usbtmc: Add ioctl USBTMC_IOCTL_CANCEL_IO ioctl USBTMC_IOCTL_CANCEL_IO stops and kills all flying urbs of last USBTMC_IOCTL_READ and USBTMC_IOCTL_WRITE function calls. A subsequent call to USBTMC_IOCTL_READ or USBTMC_IOCTL_WRITE_RESULT returns -ECANCELED with information about current transferred data. Signed-off-by: Guido Kiener Reviewed-by: Steve Bayless Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/usbtmc.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/usb/class/usbtmc.c') diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index 45ccdd087d6f..0d8aa4bc3fa7 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -2126,6 +2126,10 @@ static long usbtmc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case USBTMC488_IOCTL_TRIGGER: retval = usbtmc488_ioctl_trigger(file_data); break; + + case USBTMC_IOCTL_CANCEL_IO: + retval = usbtmc_ioctl_cancel_io(file_data); + break; } skip_io_on_zombie: -- cgit