#include "hpsa.h"
/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
-#define HPSA_DRIVER_VERSION "2.0.1-3"
+#define HPSA_DRIVER_VERSION "2.0.2-1"
#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
/* How long to wait (in milliseconds) for board to go into simple mode */
return (struct ctlr_info *) *priv;
}
-static struct task_struct *hpsa_scan_thread;
-static DEFINE_MUTEX(hpsa_scan_mutex);
-static LIST_HEAD(hpsa_scan_q);
-static int hpsa_scan_func(void *data);
-
-/**
- * add_to_scan_list() - add controller to rescan queue
- * @h: Pointer to the controller.
- *
- * Adds the controller to the rescan queue if not already on the queue.
- *
- * returns 1 if added to the queue, 0 if skipped (could be on the
- * queue already, or the controller could be initializing or shutting
- * down).
- **/
-static int add_to_scan_list(struct ctlr_info *h)
-{
- struct ctlr_info *test_h;
- int found = 0;
- int ret = 0;
-
- if (h->busy_initializing)
- return 0;
-
- /*
- * If we don't get the lock, it means the driver is unloading
- * and there's no point in scheduling a new scan.
- */
- if (!mutex_trylock(&h->busy_shutting_down))
- return 0;
-
- mutex_lock(&hpsa_scan_mutex);
- list_for_each_entry(test_h, &hpsa_scan_q, scan_list) {
- if (test_h == h) {
- found = 1;
- break;
- }
- }
- if (!found && !h->busy_scanning) {
- INIT_COMPLETION(h->scan_wait);
- list_add_tail(&h->scan_list, &hpsa_scan_q);
- ret = 1;
- }
- mutex_unlock(&hpsa_scan_mutex);
- mutex_unlock(&h->busy_shutting_down);
-
- return ret;
-}
-
-/**
- * remove_from_scan_list() - remove controller from rescan queue
- * @h: Pointer to the controller.
- *
- * Removes the controller from the rescan queue if present. Blocks if
- * the controller is currently conducting a rescan. The controller
- * can be in one of three states:
- * 1. Doesn't need a scan
- * 2. On the scan list, but not scanning yet (we remove it)
- * 3. Busy scanning (and not on the list). In this case we want to wait for
- * the scan to complete to make sure the scanning thread for this
- * controller is completely idle.
- **/
-static void remove_from_scan_list(struct ctlr_info *h)
-{
- struct ctlr_info *test_h, *tmp_h;
-
- mutex_lock(&hpsa_scan_mutex);
- list_for_each_entry_safe(test_h, tmp_h, &hpsa_scan_q, scan_list) {
- if (test_h == h) { /* state 2. */
- list_del(&h->scan_list);
- complete_all(&h->scan_wait);
- mutex_unlock(&hpsa_scan_mutex);
- return;
- }
- }
- if (h->busy_scanning) { /* state 3. */
- mutex_unlock(&hpsa_scan_mutex);
- wait_for_completion(&h->scan_wait);
- } else { /* state 1, nothing to do. */
- mutex_unlock(&hpsa_scan_mutex);
- }
-}
-
-/* hpsa_scan_func() - kernel thread used to rescan controllers
- * @data: Ignored.
- *
- * A kernel thread used scan for drive topology changes on
- * controllers. The thread processes only one controller at a time
- * using a queue. Controllers are added to the queue using
- * add_to_scan_list() and removed from the queue either after done
- * processing or using remove_from_scan_list().
- *
- * returns 0.
- **/
-static int hpsa_scan_func(__attribute__((unused)) void *data)
-{
- struct ctlr_info *h;
- int host_no;
-
- while (1) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- if (kthread_should_stop())
- break;
-
- while (1) {
- mutex_lock(&hpsa_scan_mutex);
- if (list_empty(&hpsa_scan_q)) {
- mutex_unlock(&hpsa_scan_mutex);
- break;
- }
- h = list_entry(hpsa_scan_q.next, struct ctlr_info,
- scan_list);
- list_del(&h->scan_list);
- h->busy_scanning = 1;
- mutex_unlock(&hpsa_scan_mutex);
- host_no = h->scsi_host ? h->scsi_host->host_no : -1;
- hpsa_scan_start(h->scsi_host);
- complete_all(&h->scan_wait);
- mutex_lock(&hpsa_scan_mutex);
- h->busy_scanning = 0;
- mutex_unlock(&hpsa_scan_mutex);
- }
- }
- return 0;
-}
-
static int check_for_unit_attention(struct ctlr_info *h,
struct CommandList *c)
{
break;
case REPORT_LUNS_CHANGED:
dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
- "changed\n", h->ctlr);
+ "changed, action required\n", h->ctlr);
/*
- * Here, we could call add_to_scan_list and wake up the scan thread,
- * except that it's quite likely that we will get more than one
- * REPORT_LUNS_CHANGED condition in quick succession, which means
- * that those which occur after the first one will likely happen
- * *during* the hpsa_scan_thread's rescan. And the rescan code is not
- * robust enough to restart in the middle, undoing what it has already
- * done, and it's not clear that it's even possible to do this, since
- * part of what it does is notify the SCSI mid layer, which starts
- * doing it's own i/o to read partition tables and so on, and the
- * driver doesn't have visibility to know what might need undoing.
- * In any event, if possible, it is horribly complicated to get right
- * so we just don't do it for now.
- *
* Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
*/
break;
struct ctlr_info *h;
struct Scsi_Host *shost = class_to_shost(dev);
h = shost_to_hba(shost);
- if (add_to_scan_list(h)) {
- wake_up_process(hpsa_scan_thread);
- wait_for_completion_interruptible(&h->scan_wait);
- }
+ hpsa_scan_start(h->scsi_host);
return count;
}
h->busy_initializing = 1;
INIT_HLIST_HEAD(&h->cmpQ);
INIT_HLIST_HEAD(&h->reqQ);
- mutex_init(&h->busy_shutting_down);
- init_completion(&h->scan_wait);
rc = hpsa_pci_init(h, pdev);
if (rc != 0)
goto clean1;
return;
}
h = pci_get_drvdata(pdev);
- mutex_lock(&h->busy_shutting_down);
- remove_from_scan_list(h);
hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
hpsa_shutdown(pdev);
iounmap(h->vaddr);
*/
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
- mutex_unlock(&h->busy_shutting_down);
kfree(h);
}
*/
static int __init hpsa_init(void)
{
- int err;
- /* Start the scan thread */
- hpsa_scan_thread = kthread_run(hpsa_scan_func, NULL, "hpsa_scan");
- if (IS_ERR(hpsa_scan_thread)) {
- err = PTR_ERR(hpsa_scan_thread);
- return -ENODEV;
- }
- err = pci_register_driver(&hpsa_pci_driver);
- if (err)
- kthread_stop(hpsa_scan_thread);
- return err;
+ return pci_register_driver(&hpsa_pci_driver);
}
static void __exit hpsa_cleanup(void)
{
pci_unregister_driver(&hpsa_pci_driver);
- kthread_stop(hpsa_scan_thread);
}
module_init(hpsa_init);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff