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| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2006-05-03 23:42:04 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-19 14:13:23 -0700 |
| commit | 82d5f4aaf182c306d2c2ef4d3a89d0fb8e386aa8 (patch) | |
| tree | ef7de5f12bee715364576d84bd47a05f61326d05 /drivers/pci/hotplug/shpchp_hpc.c | |
| parent | d49f2c49c39bbd0cb2069fe11c1630c709061037 (diff) | |
| download | blackbird-op-linux-82d5f4aaf182c306d2c2ef4d3a89d0fb8e386aa8.tar.gz blackbird-op-linux-82d5f4aaf182c306d2c2ef4d3a89d0fb8e386aa8.zip | |
[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.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c index 8b63f772a6f2..5e8f589d0b64 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++) { |
