[PATCH 02/18] drivers/autotune: do not read user data we should not expect

[Philippe Gerum via Xenomai]

We receive the sampling period from the setup struct attached to the
AUTOTUNE_RTIOC_{IRQ,KERN,USER} requests, drop the last copy from user
from autotune_ioctl_nrt() which is spurious.

Signed-off-by: Philippe Gerum <r...@xenomai.org>
---
 kernel/drivers/autotune/autotune.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/kernel/drivers/autotune/autotune.c 
b/kernel/drivers/autotune/autotune.c
index 46a34bf36..2629bf9d4 100644
--- a/kernel/drivers/autotune/autotune.c
+++ b/kernel/drivers/autotune/autotune.c
@@ -644,7 +644,7 @@ static int autotune_ioctl_nrt(struct rtdm_fd *fd, unsigned 
int request, void *ar
        struct autotune_context *context;
        struct autotune_setup setup;
        struct gravity_tuner *tuner;
-       int period, ret;
+       int ret;
 
        if (request == AUTOTUNE_RTIOC_RESET) {
                xnclock_reset_gravity(&nkclock);
@@ -678,10 +678,6 @@ static int autotune_ioctl_nrt(struct rtdm_fd *fd, unsigned 
int request, void *ar
                return -EINVAL;
        }
 
-       ret = rtdm_safe_copy_from_user(fd, &period, arg, sizeof(period));
-       if (ret)
-               return ret;
-
        ret = tuner->init_tuner(tuner);
        if (ret)
                return ret;
-- 
2.17.2