[ Upstream commit a4cdc9baee0740748f16e50cd70c2607510df492 ]
Subsequent code relies on the values that qeth_update_from_chp_desc() reads from the CHP descriptor. Rather than dealing with weird errors later on, just handle it properly here.
Signed-off-by: Julian Wiedmann jwi@linux.ibm.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/s390/net/qeth_core_main.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 89f912213e626..8786805b9d1c6 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1325,7 +1325,7 @@ static void qeth_set_multiple_write_queues(struct qeth_card *card) card->qdio.no_out_queues = 4; }
-static void qeth_update_from_chp_desc(struct qeth_card *card) +static int qeth_update_from_chp_desc(struct qeth_card *card) { struct ccw_device *ccwdev; struct channel_path_desc_fmt0 *chp_dsc; @@ -1335,7 +1335,7 @@ static void qeth_update_from_chp_desc(struct qeth_card *card) ccwdev = card->data.ccwdev; chp_dsc = ccw_device_get_chp_desc(ccwdev, 0); if (!chp_dsc) - goto out; + return -ENOMEM;
card->info.func_level = 0x4100 + chp_dsc->desc; if (card->info.type == QETH_CARD_TYPE_IQD) @@ -1350,6 +1350,7 @@ static void qeth_update_from_chp_desc(struct qeth_card *card) kfree(chp_dsc); QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues); QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level); + return 0; }
static void qeth_init_qdio_info(struct qeth_card *card) @@ -5086,7 +5087,9 @@ int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
QETH_DBF_TEXT(SETUP, 2, "hrdsetup"); atomic_set(&card->force_alloc_skb, 0); - qeth_update_from_chp_desc(card); + rc = qeth_update_from_chp_desc(card); + if (rc) + return rc; retry: if (retries < 3) QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n", @@ -5755,7 +5758,9 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev) }
qeth_setup_card(card); - qeth_update_from_chp_desc(card); + rc = qeth_update_from_chp_desc(card); + if (rc) + goto err_chp_desc;
card->dev = qeth_alloc_netdev(card); if (!card->dev) { @@ -5790,6 +5795,7 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev) qeth_core_free_discipline(card); err_load: free_netdev(card->dev); +err_chp_desc: err_card: qeth_core_free_card(card); err_dev: