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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2006-05-03 23:42:04 +0900
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-19 14:13:23 -0700
commit82d5f4aaf182c306d2c2ef4d3a89d0fb8e386aa8 (patch)
treeef7de5f12bee715364576d84bd47a05f61326d05 /drivers/pci/hotplug/shpchp_hpc.c
parentd49f2c49c39bbd0cb2069fe11c1630c709061037 (diff)
[PATCH] shpchp: Create shpchpd at controller probe time
The workqueue thread of shpchp driver should be created only when SHPC based hotplug slots are detected on the system. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Cc: Kristen Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/hotplug/shpchp_hpc.c')
-rw-r--r--drivers/pci/hotplug/shpchp_hpc.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index 8b63f772a6f..5e8f589d0b6 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -216,6 +216,8 @@ static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
static int ctlr_seq_num = 0; /* Controller sequenc # */
static spinlock_t list_lock;
+static atomic_t shpchp_num_controllers = ATOMIC_INIT(0);
+
static irqreturn_t shpc_isr(int IRQ, void *dev_id, struct pt_regs *regs);
static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
@@ -866,6 +868,13 @@ static void hpc_release_ctlr(struct controller *ctrl)
kfree(php_ctlr);
+ /*
+ * If this is the last controller to be released, destroy the
+ * shpchpd work queue
+ */
+ if (atomic_dec_and_test(&shpchp_num_controllers))
+ destroy_workqueue(shpchp_wq);
+
DBG_LEAVE_ROUTINE
}
@@ -1461,6 +1470,16 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
ctlr_seq_num++;
/*
+ * If this is the first controller to be initialized,
+ * initialize the shpchpd work queue
+ */
+ if (atomic_add_return(1, &shpchp_num_controllers) == 1) {
+ shpchp_wq = create_singlethread_workqueue("shpchpd");
+ if (!shpchp_wq)
+ return -ENOMEM;
+ }
+
+ /*
* Unmask all event interrupts of all slots
*/
for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {