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Message-ID: <20091208213817.23493.9266.stgit@beardog.cce.hp.com>
Date: Tue, 08 Dec 2009 15:38:17 -0600
From: "Stephen M. Cameron" <scameron@...rdog.cce.hp.com>
To: James.Bottomley@...senPartnership.com, akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, mikem@...rdog.cce.hp.com,
linux-scsi@...r.kernel.org, smcameron@...oo.com
Subject: [PATCH 2/5] hpsa: rename too generic variable names
From: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
hpsa: rename too generic variable names
Signed-off-by: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
---
drivers/scsi/hpsa.c | 50 +++++++++++++++++++++++++++-----------------------
1 files changed, 27 insertions(+), 23 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index dc5e518..8b8ddfc 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -196,9 +196,9 @@ static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
}
static struct task_struct *hpsa_scan_thread;
-static DEFINE_MUTEX(scan_mutex);
-static LIST_HEAD(scan_q);
-static int scan_thread(void *data);
+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
@@ -219,11 +219,15 @@ static int add_to_scan_list(struct ctlr_info *h)
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(&scan_mutex);
- list_for_each_entry(test_h, &scan_q, scan_list) {
+ mutex_lock(&hpsa_scan_mutex);
+ list_for_each_entry(test_h, &hpsa_scan_q, scan_list) {
if (test_h == h) {
found = 1;
break;
@@ -231,10 +235,10 @@ static int add_to_scan_list(struct ctlr_info *h)
}
if (!found && !h->busy_scanning) {
INIT_COMPLETION(h->scan_wait);
- list_add_tail(&h->scan_list, &scan_q);
+ list_add_tail(&h->scan_list, &hpsa_scan_q);
ret = 1;
}
- mutex_unlock(&scan_mutex);
+ mutex_unlock(&hpsa_scan_mutex);
mutex_unlock(&h->busy_shutting_down);
return ret;
@@ -257,24 +261,24 @@ static void remove_from_scan_list(struct ctlr_info *h)
{
struct ctlr_info *test_h, *tmp_h;
- mutex_lock(&scan_mutex);
- list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
+ 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(&scan_mutex);
+ mutex_unlock(&hpsa_scan_mutex);
return;
}
}
if (h->busy_scanning) { /* state 3. */
- mutex_unlock(&scan_mutex);
+ mutex_unlock(&hpsa_scan_mutex);
wait_for_completion(&h->scan_wait);
} else { /* state 1, nothing to do. */
- mutex_unlock(&scan_mutex);
+ mutex_unlock(&hpsa_scan_mutex);
}
}
-/* scan_thread() - kernel thread used to rescan controllers
+/* hpsa_scan_func() - kernel thread used to rescan controllers
* @data: Ignored.
*
* A kernel thread used scan for drive topology changes on
@@ -285,7 +289,7 @@ static void remove_from_scan_list(struct ctlr_info *h)
*
* returns 0.
**/
-static int scan_thread(__attribute__((unused)) void *data)
+static int hpsa_scan_func(__attribute__((unused)) void *data)
{
struct ctlr_info *h;
int host_no;
@@ -297,22 +301,22 @@ static int scan_thread(__attribute__((unused)) void *data)
break;
while (1) {
- mutex_lock(&scan_mutex);
- if (list_empty(&scan_q)) {
- mutex_unlock(&scan_mutex);
+ mutex_lock(&hpsa_scan_mutex);
+ if (list_empty(&hpsa_scan_q)) {
+ mutex_unlock(&hpsa_scan_mutex);
break;
}
- h = list_entry(scan_q.next, struct ctlr_info,
+ h = list_entry(hpsa_scan_q.next, struct ctlr_info,
scan_list);
list_del(&h->scan_list);
h->busy_scanning = 1;
- mutex_unlock(&scan_mutex);
+ mutex_unlock(&hpsa_scan_mutex);
host_no = h->scsi_host ? h->scsi_host->host_no : -1;
hpsa_update_scsi_devices(h, host_no);
complete_all(&h->scan_wait);
- mutex_lock(&scan_mutex);
+ mutex_lock(&hpsa_scan_mutex);
h->busy_scanning = 0;
- mutex_unlock(&scan_mutex);
+ mutex_unlock(&hpsa_scan_mutex);
}
}
return 0;
@@ -341,7 +345,7 @@ static int check_for_unit_attention(struct ctlr_info *h,
* 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 scan_thread's rescan. And the rescan code is not
+ * *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
@@ -3511,7 +3515,7 @@ static int __init hpsa_init(void)
{
int err;
/* Start the scan thread */
- hpsa_scan_thread = kthread_run(scan_thread, NULL, "hpsa_scan");
+ 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;
--
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