From 3711c9885278a8c7781c8af78b241be5f1fc16f1 Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Wed, 17 Apr 2019 18:17:29 +0200 Subject: [PATCH] s390/qeth: handle error from qeth_update_from_chp_desc() [ 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 Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- 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 56aacf3..461afc2 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1370,7 +1370,7 @@ 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; @@ -1380,7 +1380,7 @@ 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) @@ -1395,6 +1395,7 @@ out: 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) @@ -5090,7 +5091,9 @@ int qeth_core_hardsetup_card(struct qeth_card *card) 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, "%s Retrying to do IDX activates.\n", @@ -5768,7 +5771,9 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev) gdev->cdev[2]->handler = qeth_irq; 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) { @@ -5806,6 +5811,7 @@ err_disc: qeth_core_free_discipline(card); err_load: free_netdev(card->dev); +err_chp_desc: err_card: qeth_core_free_card(card); err_dev: -- 2.7.4