s390x/tcg: Use guest_addr_valid() instead of h2g_valid() in probe_wri…

…te_access()

If I'm not completely wrong, we are dealing with guest addresses here
and not with host addresses. Use the right check.

Fixes: c5a7392 ("s390x/tcg: Provide probe_write_access helper")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20190826075112.25637-2-david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/s390x/mem_helper.c

@@ -2616,7 +2616,7 @@ void probe_write_access(CPUS390XState *env, uint64_t addr, uint64_t len,
                         uintptr_t ra)
 {
 #ifdef CONFIG_USER_ONLY
-    if (!h2g_valid(addr) || !h2g_valid(addr + len - 1) ||
+    if (!guest_addr_valid(addr) || !guest_addr_valid(addr + len - 1) ||
         page_check_range(addr, len, PAGE_WRITE) < 0) {
         s390_program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO, ra);
     }