From 7005b7547680963ad127c5069c6be082272105bc Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Wed, 6 May 2020 10:09:48 +0200 Subject: s390/qeth: return error when starting a reset fails When starting the reset worker via sysfs is unsuccessful, return an error to the user. Modernize the sysfs input parsing while at it. Signed-off-by: Julian Wiedmann Reviewed-by: Alexandra Winter Signed-off-by: David S. Miller --- drivers/s390/net/qeth_core.h | 2 +- drivers/s390/net/qeth_core_main.c | 26 +++++++++++++++++--------- drivers/s390/net/qeth_core_sys.c | 15 +++++++++------ 3 files changed, 27 insertions(+), 16 deletions(-) (limited to 'drivers/s390') diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 6b0d37d2c638..51ea56b73a97 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -1053,7 +1053,7 @@ struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card, void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason); void qeth_put_cmd(struct qeth_cmd_buffer *iob); -void qeth_schedule_recovery(struct qeth_card *); +int qeth_schedule_recovery(struct qeth_card *card); void qeth_flush_local_addrs(struct qeth_card *card); int qeth_poll(struct napi_struct *napi, int budget); void qeth_clear_ipacmd_list(struct qeth_card *); diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 164cc7f377fc..c0ab6e7bc129 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1131,16 +1131,18 @@ static int qeth_set_thread_start_bit(struct qeth_card *card, unsigned long thread) { unsigned long flags; + int rc = 0; spin_lock_irqsave(&card->thread_mask_lock, flags); - if (!(card->thread_allowed_mask & thread) || - (card->thread_start_mask & thread)) { - spin_unlock_irqrestore(&card->thread_mask_lock, flags); - return -EPERM; - } - card->thread_start_mask |= thread; + if (!(card->thread_allowed_mask & thread)) + rc = -EPERM; + else if (card->thread_start_mask & thread) + rc = -EBUSY; + else + card->thread_start_mask |= thread; spin_unlock_irqrestore(&card->thread_mask_lock, flags); - return 0; + + return rc; } static void qeth_clear_thread_start_bit(struct qeth_card *card, @@ -1193,11 +1195,17 @@ static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread) return rc; } -void qeth_schedule_recovery(struct qeth_card *card) +int qeth_schedule_recovery(struct qeth_card *card) { + int rc; + QETH_CARD_TEXT(card, 2, "startrec"); - if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0) + + rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD); + if (!rc) schedule_work(&card->kernel_thread_starter); + + return rc; } static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev, diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c index d7e429f6631e..c901c942fed7 100644 --- a/drivers/s390/net/qeth_core_sys.c +++ b/drivers/s390/net/qeth_core_sys.c @@ -275,17 +275,20 @@ static ssize_t qeth_dev_recover_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct qeth_card *card = dev_get_drvdata(dev); - char *tmp; - int i; + bool reset; + int rc; + + rc = kstrtobool(buf, &reset); + if (rc) + return rc; if (!qeth_card_hw_is_reachable(card)) return -EPERM; - i = simple_strtoul(buf, &tmp, 16); - if (i == 1) - qeth_schedule_recovery(card); + if (reset) + rc = qeth_schedule_recovery(card); - return count; + return rc ? rc : count; } static DEVICE_ATTR(recover, 0200, NULL, qeth_dev_recover_store); -- cgit v1.2.3