diff options
Diffstat (limited to 'drivers/s390/crypto/ap_bus.c')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 5c13d2079d96..7d5261113181 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -835,6 +835,17 @@ static void ap_bus_revise_bindings(void) bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved); } +/** + * ap_owned_by_def_drv: indicates whether an AP adapter is reserved for the + * default host driver or not. + * @card: the APID of the adapter card to check + * @queue: the APQI of the queue to check + * + * Note: the ap_perms_mutex must be locked by the caller of this function. + * + * Return: an int specifying whether the AP adapter is reserved for the host (1) + * or not (0). + */ int ap_owned_by_def_drv(int card, int queue) { int rc = 0; @@ -842,25 +853,31 @@ int ap_owned_by_def_drv(int card, int queue) if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS) return -EINVAL; - mutex_lock(&ap_perms_mutex); - if (test_bit_inv(card, ap_perms.apm) && test_bit_inv(queue, ap_perms.aqm)) rc = 1; - mutex_unlock(&ap_perms_mutex); - return rc; } EXPORT_SYMBOL(ap_owned_by_def_drv); +/** + * ap_apqn_in_matrix_owned_by_def_drv: indicates whether every APQN contained in + * a set is reserved for the host drivers + * or not. + * @apm: a bitmap specifying a set of APIDs comprising the APQNs to check + * @aqm: a bitmap specifying a set of APQIs comprising the APQNs to check + * + * Note: the ap_perms_mutex must be locked by the caller of this function. + * + * Return: an int specifying whether each APQN is reserved for the host (1) or + * not (0) + */ int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, unsigned long *aqm) { int card, queue, rc = 0; - mutex_lock(&ap_perms_mutex); - for (card = 0; !rc && card < AP_DEVICES; card++) if (test_bit_inv(card, apm) && test_bit_inv(card, ap_perms.apm)) @@ -869,8 +886,6 @@ int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, test_bit_inv(queue, ap_perms.aqm)) rc = 1; - mutex_unlock(&ap_perms_mutex); - return rc; } EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv); |