Commit f7f1b16b authored by Johannes Berg's avatar Johannes Berg Committed by Greg Kroah-Hartman

Revert "wext: Fix 32 bit iwpriv compatibility issue with 64 bit Kernel"

commit 4d0bd46a upstream.

This reverts commit 3d5fdff4.

Ben Hutchings pointed out that the commit isn't safe since it assumes
that the structure used by the driver is iw_point, when in fact there's
no way to know about that.

Fortunately, the only driver in the tree that ever runs this code path
is the wilc1000 staging driver, so it doesn't really matter.

Clearly I should have investigated this better before applying, sorry.
Reported-by: default avatarBen Hutchings <ben@decadent.org.uk>
Fixes: 3d5fdff4 ("wext: Fix 32 bit iwpriv compatibility issue with 64 bit Kernel")
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 283a2436
......@@ -958,29 +958,8 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr,
return private(dev, iwr, cmd, info, handler);
}
/* Old driver API : call driver ioctl handler */
if (dev->netdev_ops->ndo_do_ioctl) {
#ifdef CONFIG_COMPAT
if (info->flags & IW_REQUEST_FLAG_COMPAT) {
int ret = 0;
struct iwreq iwr_lcl;
struct compat_iw_point *iwp_compat = (void *) &iwr->u.data;
memcpy(&iwr_lcl, iwr, sizeof(struct iwreq));
iwr_lcl.u.data.pointer = compat_ptr(iwp_compat->pointer);
iwr_lcl.u.data.length = iwp_compat->length;
iwr_lcl.u.data.flags = iwp_compat->flags;
ret = dev->netdev_ops->ndo_do_ioctl(dev, (void *) &iwr_lcl, cmd);
iwp_compat->pointer = ptr_to_compat(iwr_lcl.u.data.pointer);
iwp_compat->length = iwr_lcl.u.data.length;
iwp_compat->flags = iwr_lcl.u.data.flags;
return ret;
} else
#endif
return dev->netdev_ops->ndo_do_ioctl(dev, ifr, cmd);
}
if (dev->netdev_ops->ndo_do_ioctl)
return dev->netdev_ops->ndo_do_ioctl(dev, ifr, cmd);
return -EOPNOTSUPP;
}
......
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