diff options
Diffstat (limited to 'drivers/s390/crypto/zcrypt_card.c')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_card.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/s390/crypto/zcrypt_card.c b/drivers/s390/crypto/zcrypt_card.c index 09fe6bb8880b..40fd5d37d26a 100644 --- a/drivers/s390/crypto/zcrypt_card.c +++ b/drivers/s390/crypto/zcrypt_card.c @@ -64,7 +64,8 @@ static ssize_t online_store(struct device *dev, struct ap_card *ac = to_ap_card(dev); struct zcrypt_card *zc = ac->private; struct zcrypt_queue *zq; - int online, id; + int online, id, i = 0, maxzqs = 0; + struct zcrypt_queue **zq_uelist = NULL; if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) return -EINVAL; @@ -77,10 +78,35 @@ static ssize_t online_store(struct device *dev, ZCRYPT_DBF(DBF_INFO, "card=%02x online=%d\n", id, online); + ap_send_online_uevent(&ac->ap_dev, online); + spin_lock(&zcrypt_list_lock); + /* + * As we are in atomic context here, directly sending uevents + * does not work. So collect the zqueues in a dynamic array + * and process them after zcrypt_list_lock release. As we get/put + * the zqueue objects, we make sure they exist after lock release. + */ + list_for_each_entry(zq, &zc->zqueues, list) + maxzqs++; + if (maxzqs > 0) + zq_uelist = kcalloc(maxzqs + 1, sizeof(zq), GFP_ATOMIC); list_for_each_entry(zq, &zc->zqueues, list) - zcrypt_queue_force_online(zq, online); + if (zcrypt_queue_force_online(zq, online)) + if (zq_uelist) { + zcrypt_queue_get(zq); + zq_uelist[i++] = zq; + } spin_unlock(&zcrypt_list_lock); + if (zq_uelist) { + for (i = 0; zq_uelist[i]; i++) { + zq = zq_uelist[i]; + ap_send_online_uevent(&zq->queue->ap_dev, online); + zcrypt_queue_put(zq); + } + kfree(zq_uelist); + } + return count; } |