drm/xe/eustall: Disallow 0 EU stall property values

An EU stall property value of 0 is invalid and will cause a NPD.

Reported-by: Peter Senna Tschudin <[e-mail]>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6453
Fixes: 1537ec85ebd7 ("drm/xe/uapi: Introduce API for EU stall sampling")
Cc: [e-mail]
Signed-off-by: Ashutosh Dixit <[e-mail]>
Reviewed-by: Harish Chegondi <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
(cherry picked from commit 5bf763e908bf795da4ad538d21c1ec41f8021f76)
Signed-off-by: Thomas Hellström <[e-mail]>

drivers/gpu/drm/xe/xe_eu_stall.c

···
 		return -EFAULT;
 
 	if (XE_IOCTL_DBG(xe, ext.property >= ARRAY_SIZE(xe_set_eu_stall_property_funcs)) ||
-	    XE_IOCTL_DBG(xe, ext.pad))
+	    XE_IOCTL_DBG(xe, !ext.property) || XE_IOCTL_DBG(xe, ext.pad))
 		return -EINVAL;
 
 	idx = array_index_nospec(ext.property, ARRAY_SIZE(xe_set_eu_stall_property_funcs));