* [PATCH net 1/2] s390/qeth: Fix error handling during VNICC initialization
2019-10-08 16:21 [PATCH net 0/2] s390/qeth: fixes 2019-10-08 Julian Wiedmann
@ 2019-10-08 16:21 ` Julian Wiedmann
2019-10-08 16:21 ` [PATCH net 2/2] s390/qeth: Fix initialization of vnicc cmd masks during set online Julian Wiedmann
2019-10-10 1:05 ` [PATCH net 0/2] s390/qeth: fixes 2019-10-08 Jakub Kicinski
2 siblings, 0 replies; 4+ messages in thread
From: Julian Wiedmann @ 2019-10-08 16:21 UTC (permalink / raw)
To: David Miller
Cc: netdev, linux-s390, Heiko Carstens, Stefan Raspl, Ursula Braun,
Alexandra Winter, Julian Wiedmann
From: Alexandra Winter <wintera@linux.ibm.com>
Smatch discovered the use of uninitialized variable sup_cmds
in error paths.
Fixes: caa1f0b10d18 ("s390/qeth: add VNICC enable/disable support")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
---
drivers/s390/net/qeth_l2_main.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index b8799cd3e7aa..de62a9ccc882 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -2021,10 +2021,10 @@ static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
static void qeth_l2_vnicc_init(struct qeth_card *card)
{
u32 *timeout = &card->options.vnicc.learning_timeout;
+ bool enable, error = false;
unsigned int chars_len, i;
unsigned long chars_tmp;
u32 sup_cmds, vnicc;
- bool enable, error;
QETH_CARD_TEXT(card, 2, "vniccini");
/* reset rx_bcast */
@@ -2045,7 +2045,10 @@ static void qeth_l2_vnicc_init(struct qeth_card *card)
chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
for_each_set_bit(i, &chars_tmp, chars_len) {
vnicc = BIT(i);
- qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
+ if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
+ sup_cmds = 0;
+ error = true;
+ }
if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
!(sup_cmds & IPA_VNICC_GET_TIMEOUT))
card->options.vnicc.getset_timeout_sup &= ~vnicc;
@@ -2054,8 +2057,8 @@ static void qeth_l2_vnicc_init(struct qeth_card *card)
card->options.vnicc.set_char_sup &= ~vnicc;
}
/* enforce assumed default values and recover settings, if changed */
- error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
- timeout);
+ error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
+ timeout);
chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH net 2/2] s390/qeth: Fix initialization of vnicc cmd masks during set online
2019-10-08 16:21 [PATCH net 0/2] s390/qeth: fixes 2019-10-08 Julian Wiedmann
2019-10-08 16:21 ` [PATCH net 1/2] s390/qeth: Fix error handling during VNICC initialization Julian Wiedmann
@ 2019-10-08 16:21 ` Julian Wiedmann
2019-10-10 1:05 ` [PATCH net 0/2] s390/qeth: fixes 2019-10-08 Jakub Kicinski
2 siblings, 0 replies; 4+ messages in thread
From: Julian Wiedmann @ 2019-10-08 16:21 UTC (permalink / raw)
To: David Miller
Cc: netdev, linux-s390, Heiko Carstens, Stefan Raspl, Ursula Braun,
Alexandra Winter, Julian Wiedmann
From: Alexandra Winter <wintera@linux.ibm.com>
Without this patch, a command bit in the supported commands mask is only
ever set to unsupported during set online. If a command is ever marked as
unsupported (e.g. because of error during qeth_l2_vnicc_query_cmds),
subsequent successful initialization (offline/online) would not bring it
back.
Fixes: caa1f0b10d18 ("s390/qeth: add VNICC enable/disable support")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
---
drivers/s390/net/qeth_l2_main.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index de62a9ccc882..bd8143e51747 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -2049,11 +2049,15 @@ static void qeth_l2_vnicc_init(struct qeth_card *card)
sup_cmds = 0;
error = true;
}
- if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
- !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
+ if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
+ (sup_cmds & IPA_VNICC_GET_TIMEOUT))
+ card->options.vnicc.getset_timeout_sup |= vnicc;
+ else
card->options.vnicc.getset_timeout_sup &= ~vnicc;
- if (!(sup_cmds & IPA_VNICC_ENABLE) ||
- !(sup_cmds & IPA_VNICC_DISABLE))
+ if ((sup_cmds & IPA_VNICC_ENABLE) &&
+ (sup_cmds & IPA_VNICC_DISABLE))
+ card->options.vnicc.set_char_sup |= vnicc;
+ else
card->options.vnicc.set_char_sup &= ~vnicc;
}
/* enforce assumed default values and recover settings, if changed */
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread