diff options
Diffstat (limited to 'drivers/s390/crypto/ap_bus.c')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index fdf16cb70881..dc37732412d7 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -693,6 +693,24 @@ void ap_send_online_uevent(struct ap_device *ap_dev, int online) } EXPORT_SYMBOL(ap_send_online_uevent); +static void ap_send_mask_changed_uevent(unsigned long *newapm, + unsigned long *newaqm) +{ + char buf[100]; + char *envp[] = { buf, NULL }; + + if (newapm) + snprintf(buf, sizeof(buf), + "APMASK=0x%016lx%016lx%016lx%016lx\n", + newapm[0], newapm[1], newapm[2], newapm[3]); + else + snprintf(buf, sizeof(buf), + "AQMASK=0x%016lx%016lx%016lx%016lx\n", + newaqm[0], newaqm[1], newaqm[2], newaqm[3]); + + kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); +} + /* * calc # of bound APQNs */ @@ -1355,7 +1373,7 @@ static int apmask_commit(unsigned long *newapm) static ssize_t apmask_store(struct bus_type *bus, const char *buf, size_t count) { - int rc; + int rc, changes = 0; DECLARE_BITMAP(newapm, AP_DEVICES); if (mutex_lock_interruptible(&ap_perms_mutex)) @@ -1365,14 +1383,19 @@ static ssize_t apmask_store(struct bus_type *bus, const char *buf, if (rc) goto done; - rc = apmask_commit(newapm); + changes = memcmp(ap_perms.apm, newapm, APMASKSIZE); + if (changes) + rc = apmask_commit(newapm); done: mutex_unlock(&ap_perms_mutex); if (rc) return rc; - ap_bus_revise_bindings(); + if (changes) { + ap_bus_revise_bindings(); + ap_send_mask_changed_uevent(newapm, NULL); + } return count; } @@ -1443,7 +1466,7 @@ static int aqmask_commit(unsigned long *newaqm) static ssize_t aqmask_store(struct bus_type *bus, const char *buf, size_t count) { - int rc; + int rc, changes = 0; DECLARE_BITMAP(newaqm, AP_DOMAINS); if (mutex_lock_interruptible(&ap_perms_mutex)) @@ -1453,14 +1476,19 @@ static ssize_t aqmask_store(struct bus_type *bus, const char *buf, if (rc) goto done; - rc = aqmask_commit(newaqm); + changes = memcmp(ap_perms.aqm, newaqm, APMASKSIZE); + if (changes) + rc = aqmask_commit(newaqm); done: mutex_unlock(&ap_perms_mutex); if (rc) return rc; - ap_bus_revise_bindings(); + if (changes) { + ap_bus_revise_bindings(); + ap_send_mask_changed_uevent(NULL, newaqm); + } return count; } |