usb: usbtmc: Fix erroneous ioctl returns

Recent tests with timeouts > INT_MAX produced random error returns with usbtmc_get_stb. This was caused by assigning the return value of wait_event_interruptible_timeout to an int which overflowed to negative values. Also return value on success was the remaining number of jiffies instead of 0.

These patches fix all the cases where the return of wait_event_interruptible_timeout was assigned to an int and the case of the remaining jiffies return in usbtmc_get_stb.

Patch 1: Fixes usbtmc_get_stb
Patch 2: Fixes usbtmc488_ioctl_wait_srq
Patch 3: Fixes usbtmc_generic_read

Dave Penkler (3):
usb: usbtmc: Fix erroneous get_stb ioctl error returns
usb: usbtmc: Fix erroneous wait_srq ioctl return
usb: usbtmc: Fix erroneous generic_read ioctl return

 drivers/usb/class/usbtmc.c | 53 ++++++++++++++++++++++----------------
 1 file changed, 31 insertions(+), 22 deletions(-)

--
Changes V1 => V2 Add cc to stable line
V2 => V3 Add susbsystem to cover letter
2.49.0

I'm confused, I don't see a full v3 set of patches here. Look at what ended up on the list:

	https://lore.kernel.org/all/[email protected]/

That's just the cover letter?

Can you try again? Something seems to have gotten lost.

thanks,

greg k-h