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authorAnil Veerabhadrappa <anilgv@broadcom.com>2009-06-23 14:07:40 -0700
committerJames Bottomley <James.Bottomley@suse.de>2009-08-22 17:51:53 -0500
commit3be924fb1d7be90c3ae6aa30ca42e9aa5d75efaf (patch)
tree5b0f81e20c15a8f11c5b0aca137768d415ca91e7 /drivers/scsi/bnx2i
parent4e85f15166a6a9da8317ddb8600b604b27e58aa3 (diff)
[SCSI] bnx2i: convert bnx2i_dev_lock to mutex
convert bnx2i_dev_lock to type mutex from rwlock_t because cnic->register_device() can sleep for various reasons including memory allocation, waiting for ISCSI_INIT completion and while acquiring mutex lock, cnic_lock. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: Anil Veerabhadrappa <anilgv@broadcom.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/bnx2i')
-rw-r--r--drivers/scsi/bnx2i/bnx2i_init.c54
1 files changed, 25 insertions, 29 deletions
diff --git a/drivers/scsi/bnx2i/bnx2i_init.c b/drivers/scsi/bnx2i/bnx2i_init.c
index 2aeeeee3372d..fd78540ffc95 100644
--- a/drivers/scsi/bnx2i/bnx2i_init.c
+++ b/drivers/scsi/bnx2i/bnx2i_init.c
@@ -17,8 +17,8 @@ static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
static u32 adapter_count;
#define DRV_MODULE_NAME "bnx2i"
-#define DRV_MODULE_VERSION "2.0.1d"
-#define DRV_MODULE_RELDATE "Mar 25, 2009"
+#define DRV_MODULE_VERSION "2.0.1e"
+#define DRV_MODULE_RELDATE "June 22, 2009"
static char version[] __devinitdata =
"Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
@@ -30,7 +30,7 @@ MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709 iSCSI Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);
-static DEFINE_RWLOCK(bnx2i_dev_lock);
+static DEFINE_MUTEX(bnx2i_dev_lock);
unsigned int event_coal_div = 1;
module_param(event_coal_div, int, 0664);
@@ -99,14 +99,14 @@ struct bnx2i_hba *get_adapter_list_head(void)
if (!adapter_count)
goto hba_not_found;
- read_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
list_for_each_entry(tmp_hba, &adapter_list, link) {
if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
hba = tmp_hba;
break;
}
}
- read_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
hba_not_found:
return hba;
}
@@ -121,14 +121,14 @@ struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic)
{
struct bnx2i_hba *hba, *temp;
- read_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
list_for_each_entry_safe(hba, temp, &adapter_list, link) {
if (hba->cnic == cnic) {
- read_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
return hba;
}
}
- read_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
return NULL;
}
@@ -206,10 +206,10 @@ void bnx2i_reg_dev_all(void)
{
struct bnx2i_hba *hba, *temp;
- read_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
list_for_each_entry_safe(hba, temp, &adapter_list, link)
bnx2i_register_device(hba);
- read_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
}
@@ -246,10 +246,10 @@ void bnx2i_unreg_dev_all(void)
{
struct bnx2i_hba *hba, *temp;
- read_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
list_for_each_entry_safe(hba, temp, &adapter_list, link)
bnx2i_unreg_one_device(hba);
- read_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
}
@@ -258,19 +258,21 @@ void bnx2i_unreg_dev_all(void)
* @hba: bnx2i adapter instance
* @cnic: cnic device handle
*
- * Global resource lock and host adapter lock is held during critical sections
- * below. This routine is called from cnic_register_driver() context and
- * work horse thread which does majority of device specific initialization
+ * Global resource lock is held during critical sections below. This routine is
+ * called from either cnic_register_driver() or device hot plug context and
+ * and does majority of device specific initialization
*/
static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
{
int rc;
- read_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
if (!rc) {
hba->age++;
set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+ list_add_tail(&hba->link, &adapter_list);
+ adapter_count++;
} else if (rc == -EBUSY) /* duplicate registration */
printk(KERN_ALERT "bnx2i, duplicate registration"
"hba=%p, cnic=%p\n", hba, cnic);
@@ -280,14 +282,8 @@ static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
else
printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
- read_unlock(&bnx2i_dev_lock);
- if (!rc) {
- write_lock(&bnx2i_dev_lock);
- list_add_tail(&hba->link, &adapter_list);
- adapter_count++;
- write_unlock(&bnx2i_dev_lock);
- }
+ mutex_unlock(&bnx2i_dev_lock);
return rc;
}
@@ -337,7 +333,7 @@ void bnx2i_ulp_exit(struct cnic_dev *dev)
"found, dev 0x%p\n", dev);
return;
}
- write_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
list_del_init(&hba->link);
adapter_count--;
@@ -345,7 +341,7 @@ void bnx2i_ulp_exit(struct cnic_dev *dev)
hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
}
- write_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
bnx2i_free_hba(hba);
}
@@ -367,6 +363,8 @@ static int __init bnx2i_mod_init(void)
if (!is_power_of_2(sq_size))
sq_size = roundup_pow_of_two(sq_size);
+ mutex_init(&bnx2i_dev_lock);
+
bnx2i_scsi_xport_template =
iscsi_register_transport(&bnx2i_iscsi_transport);
if (!bnx2i_scsi_xport_template) {
@@ -402,7 +400,7 @@ static void __exit bnx2i_mod_exit(void)
{
struct bnx2i_hba *hba;
- write_lock(&bnx2i_dev_lock);
+ mutex_lock(&bnx2i_dev_lock);
while (!list_empty(&adapter_list)) {
hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
list_del(&hba->link);
@@ -413,11 +411,9 @@ static void __exit bnx2i_mod_exit(void)
clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
}
- write_unlock(&bnx2i_dev_lock);
bnx2i_free_hba(hba);
- write_lock(&bnx2i_dev_lock);
}
- write_unlock(&bnx2i_dev_lock);
+ mutex_unlock(&bnx2i_dev_lock);
iscsi_unregister_transport(&bnx2i_iscsi_transport);
cnic_unregister_driver(CNIC_ULP_ISCSI);