diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ieee1394/nodemgr.c | 69 |
1 files changed, 43 insertions, 26 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index 893955249bad..c4d3d4131f01 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -19,6 +19,7 @@ #include <linux/mutex.h> #include <linux/freezer.h> #include <asm/atomic.h> +#include <asm/semaphore.h> #include "csr.h" #include "highlevel.h" @@ -145,8 +146,6 @@ static struct csr1212_bus_ops nodemgr_csr_ops = { * but now we are much simpler because of the LDM. */ -static DEFINE_MUTEX(nodemgr_serialize); - struct host_info { struct hpsb_host *host; struct list_head list; @@ -1382,6 +1381,8 @@ static void nodemgr_suspend_ne(struct node_entry *ne) { struct device *dev; struct unit_directory *ud; + struct device_driver *drv; + int error; HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); @@ -1395,10 +1396,19 @@ static void nodemgr_suspend_ne(struct node_entry *ne) if (ud->ne != ne) continue; - if (ud->device.driver && - (!ud->device.driver->suspend || - ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) + drv = get_driver(ud->device.driver); + if (!drv) + continue; + + error = 1; /* release if suspend is not implemented */ + if (drv->suspend) { + down(&ud->device.sem); + error = drv->suspend(&ud->device, PMSG_SUSPEND); + up(&ud->device.sem); + } + if (error) device_release_driver(&ud->device); + put_driver(drv); } up(&nodemgr_ud_class.sem); } @@ -1408,6 +1418,7 @@ static void nodemgr_resume_ne(struct node_entry *ne) { struct device *dev; struct unit_directory *ud; + struct device_driver *drv; ne->in_limbo = 0; device_remove_file(&ne->device, &dev_attr_ne_in_limbo); @@ -1418,8 +1429,16 @@ static void nodemgr_resume_ne(struct node_entry *ne) if (ud->ne != ne) continue; - if (ud->device.driver && ud->device.driver->resume) - ud->device.driver->resume(&ud->device); + drv = get_driver(ud->device.driver); + if (!drv) + continue; + + if (drv->resume) { + down(&ud->device.sem); + drv->resume(&ud->device); + up(&ud->device.sem); + } + put_driver(drv); } up(&nodemgr_ud_class.sem); @@ -1430,9 +1449,11 @@ static void nodemgr_resume_ne(struct node_entry *ne) static void nodemgr_update_pdrv(struct node_entry *ne) { + struct device *dev; struct unit_directory *ud; + struct device_driver *drv; struct hpsb_protocol_driver *pdrv; - struct device *dev; + int error; down(&nodemgr_ud_class.sem); list_for_each_entry(dev, &nodemgr_ud_class.devices, node) { @@ -1440,13 +1461,20 @@ static void nodemgr_update_pdrv(struct node_entry *ne) if (ud->ne != ne) continue; - if (ud->device.driver) { - pdrv = container_of(ud->device.driver, - struct hpsb_protocol_driver, - driver); - if (pdrv->update && pdrv->update(ud)) - device_release_driver(&ud->device); + drv = get_driver(ud->device.driver); + if (!drv) + continue; + + error = 0; + pdrv = container_of(drv, struct hpsb_protocol_driver, driver); + if (pdrv->update) { + down(&ud->device.sem); + error = pdrv->update(ud); + up(&ud->device.sem); } + if (error) + device_release_driver(&ud->device); + put_driver(drv); } up(&nodemgr_ud_class.sem); } @@ -1688,18 +1716,12 @@ static int nodemgr_host_thread(void *__hi) if (kthread_should_stop()) goto exit; - if (mutex_lock_interruptible(&nodemgr_serialize)) { - if (try_to_freeze()) - continue; - goto exit; - } - /* Pause for 1/4 second in 1/16 second intervals, * to make sure things settle down. */ g = get_hpsb_generation(host); for (i = 0; i < 4 ; i++) { if (msleep_interruptible(63) || kthread_should_stop()) - goto unlock_exit; + goto exit; /* Now get the generation in which the node ID's we collect * are valid. During the bus scan we will use this generation @@ -1717,7 +1739,6 @@ static int nodemgr_host_thread(void *__hi) if (!nodemgr_check_irm_capability(host, reset_cycles) || !nodemgr_do_irm_duties(host, reset_cycles)) { reset_cycles++; - mutex_unlock(&nodemgr_serialize); continue; } reset_cycles = 0; @@ -1734,11 +1755,7 @@ static int nodemgr_host_thread(void *__hi) /* Update some of our sysfs symlinks */ nodemgr_update_host_dev_links(host); - - mutex_unlock(&nodemgr_serialize); } -unlock_exit: - mutex_unlock(&nodemgr_serialize); exit: HPSB_VERBOSE("NodeMgr: Exiting thread"); return 0; |