[PATCH 5.4 036/203] s390/qeth: vnicc Fix init to default

[Greg Kroah-Hartman]

From: Alexandra Winter <wintera@xxxxxxxxxxxxx>

commit d1b9ae1864fc3c000e0eb4af8482d78c63e0915a upstream.

During vnicc_init wanted_char should be compared to cur_char and not
to QETH_VNICC_DEFAULT. Without this patch there is no way to enforce
the default values as desired values.

Note, that it is expected, that a card comes online with default values.
This patch was tested with private card firmware.

Fixes: caa1f0b10d18 ("s390/qeth: add VNICC enable/disable support")
Signed-off-by: Alexandra Winter <wintera@xxxxxxxxxxxxx>
Signed-off-by: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/s390/net/qeth_l2_main.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -2070,7 +2070,9 @@ static void qeth_l2_vnicc_init(struct qe
 	/* enforce assumed default values and recover settings, if changed  */
 	error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
 					       timeout);
-	chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
+	/* Change chars, if necessary  */
+	chars_tmp = card->options.vnicc.wanted_chars ^
+		    card->options.vnicc.cur_chars;
 	chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
 	for_each_set_bit(i, &chars_tmp, chars_len) {
 		vnicc = BIT(i);