diff options
| author | Guido Kiener <guido@kiener-muenchen.de> | 2018-09-12 10:50:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-20 13:04:02 +0200 |
| commit | 46ecc9d54efc11bf99689901f867854d264cbc0b (patch) | |
| tree | 0aed4f5b315265e2f77d31ebc915055e04b75552 /include/uapi/linux/usb | |
| parent | bb99794a4792068cb4bfd40e99e0f9d8fe7872fa (diff) | |
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 <guido.kiener@rohde-schwarz.com>
Reviewed-by: Steve Bayless <steve_bayless@keysight.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/linux/usb')
| -rw-r--r-- | include/uapi/linux/usb/tmc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/usb/tmc.h b/include/uapi/linux/usb/tmc.h index f0fd0d4334ec..42e275d1d385 100644 --- a/include/uapi/linux/usb/tmc.h +++ b/include/uapi/linux/usb/tmc.h @@ -97,6 +97,9 @@ struct usbtmc_message { #define USBTMC488_IOCTL_LOCAL_LOCKOUT _IO(USBTMC_IOC_NR, 21) #define USBTMC488_IOCTL_TRIGGER _IO(USBTMC_IOC_NR, 22) +/* Cancel and cleanup asynchronous calls */ +#define USBTMC_IOCTL_CANCEL_IO _IO(USBTMC_IOC_NR, 35) + /* Driver encoded usb488 capabilities */ #define USBTMC488_CAPABILITY_TRIGGER 1 #define USBTMC488_CAPABILITY_SIMPLE 2 |