xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: usbtmc: Add ioctl USBTMC_IOCTL_CANCEL_IO

Browse Source 
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>
This commit is contained in:
Guido Kiener
2018-09-12 10:50:55 +02:00
committed by Greg Kroah-Hartman
parent bb99794a47
commit 46ecc9d54e
2 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/uapi/linux/usb/tmc.h
View File

@@ -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