diff options
| author | Guido Kiener <guido@kiener-muenchen.de> | 2018-09-12 10:50:53 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-20 13:04:02 +0200 |
| commit | b14984518ee60ef7662aa6520b76ae6046e08857 (patch) | |
| tree | 5ef116dbb945f678777e63dbea3b8d9dc3e463f4 /drivers | |
| parent | 4ddc645f40e90fa3bc7af3a3f3bd7d29e671a775 (diff) | |
| download | linux-b14984518ee60ef7662aa6520b76ae6046e08857.tar.bz2 | |
usb: usbtmc: Add ioctl USBTMC_IOCTL_WRITE_RESULT
ioctl USBTMC_IOCTL_WRITE_RESULT copies current out_transfer_size
to given __u32 pointer and returns current out_status of the last
(asnynchronous) USBTMC_IOCTL_WRITE call.
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 'drivers')
| -rw-r--r-- | drivers/usb/class/usbtmc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index 915c3fefc4e3..eec382ab1a44 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -894,6 +894,26 @@ static ssize_t usbtmc_ioctl_generic_write(struct usbtmc_file_data *file_data, } /* + * Get the generic write result + */ +static ssize_t usbtmc_ioctl_write_result(struct usbtmc_file_data *file_data, + void __user *arg) +{ + u32 transferred; + int retval; + + spin_lock_irq(&file_data->err_lock); + transferred = file_data->out_transfer_size; + retval = file_data->out_status; + spin_unlock_irq(&file_data->err_lock); + + if (put_user(transferred, (__u32 __user *)arg)) + return -EFAULT; + + return retval; +} + +/* * Sends a REQUEST_DEV_DEP_MSG_IN message on the Bulk-OUT endpoint. * @transfer_size: number of bytes to request from the device. * @@ -1748,6 +1768,11 @@ static long usbtmc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) (void __user *)arg); break; + case USBTMC_IOCTL_WRITE_RESULT: + retval = usbtmc_ioctl_write_result(file_data, + (void __user *)arg); + break; + case USBTMC488_IOCTL_GET_CAPS: retval = copy_to_user((void __user *)arg, &data->usb488_caps, |