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usb: usbtmc: Add support for 32 bit compat applications 

32 bit applications can only call ioctl functions on 64 bit systems
when the field .compat_ioctl is defined for file operations.

Tested-by: Dave Penkler <dpenkler@gmail.com>
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 2018-07-24 11:05:28 +02:00 committed by Greg Kroah-Hartman
parent 12dcaeb77e
commit 60207c8ef2
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/class/usbtmc.c
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@ -18,6 +18,7 @@
#include <linux/poll.h>
#include <linux/mutex.h>
#include <linux/usb.h>
#include <linux/compat.h>
#include <linux/usb/tmc.h>
@ -1459,6 +1460,9 @@ static const struct file_operations fops = {
.open = usbtmc_open,
.release = usbtmc_release,
.unlocked_ioctl = usbtmc_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = usbtmc_ioctl,
#endif
.fasync = usbtmc_fasync,
.poll = usbtmc_poll,
.llseek = default_llseek,