diff mbox

[v4,35/43] hpsa: create workqueue after the driver is ready for use

Message ID 20150416134952.30238.81509.stgit@brunhilda (mailing list archive)
State New, archived
Headers show

Commit Message

Don Brace April 16, 2015, 1:49 p.m. UTC 
From: Robert Elliott <elliott@hp.com>

Don't create the resubmit workqueue in hpsa_init_one until everything else
is ready to use, so everything can be freed in reverse order of when they
were allocated without risking freeing things while workqueue items are
still active.

Destroy the workqueue in the right order in
hpsa_undo_allocations_after_kdump_soft_reset too.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Signed-off-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
---
 drivers/scsi/hpsa.c |   60 ++++++++++++++++++++++++++-------------------------
 1 file changed, 31 insertions(+), 29 deletions(-)


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Comments

Hannes Reinecke April 17, 2015, 1:30 p.m. UTC | #1 
On 04/16/2015 03:49 PM, Don Brace wrote:
> From: Robert Elliott <elliott@hp.com>
> 
> Don't create the resubmit workqueue in hpsa_init_one until everything else
> is ready to use, so everything can be freed in reverse order of when they
> were allocated without risking freeing things while workqueue items are
> still active.
> 
> Destroy the workqueue in the right order in
> hpsa_undo_allocations_after_kdump_soft_reset too.
> 
> Reviewed-by: Scott Teel <scott.teel@pmcs.com>
> Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
> Signed-off-by: Robert Elliott <elliott@hp.com>
> Signed-off-by: Don Brace <don.brace@pmcs.com>
> ---
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
Tomas Henzl April 17, 2015, 1:46 p.m. UTC | #2 
On 04/16/2015 03:49 PM, Don Brace wrote:
> From: Robert Elliott <elliott@hp.com>
>
> Don't create the resubmit workqueue in hpsa_init_one until everything else
> is ready to use, so everything can be freed in reverse order of when they
> were allocated without risking freeing things while workqueue items are
> still active.
>
> Destroy the workqueue in the right order in
> hpsa_undo_allocations_after_kdump_soft_reset too.
>
> Reviewed-by: Scott Teel <scott.teel@pmcs.com>
> Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
> Signed-off-by: Robert Elliott <elliott@hp.com>
> Signed-off-by: Don Brace <don.brace@pmcs.com>

Reviewed-by: Tomas Henzl <thenzl@redhat.com>

Tomas


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diff mbox

Patch

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index c6e950e..fb755a8 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -7688,30 +7688,18 @@  reinit_after_soft_reset:
 	atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
 	atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
 
-	h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
-	if (!h->rescan_ctlr_wq) {
-		rc = -ENOMEM;
-		goto clean1;
-	}
-
-	h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
-	if (!h->resubmit_wq) {
-		rc = -ENOMEM;
-		goto clean1;	/* aer/h */
-	}
-
 	/* Allocate and clear per-cpu variable lockup_detected */
 	h->lockup_detected = alloc_percpu(u32);
 	if (!h->lockup_detected) {
 		dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
 		rc = -ENOMEM;
-		goto clean1;	/* wq/aer/h */
+		goto clean1;	/* aer/h */
 	}
 	set_lockup_detected_for_all_cpus(h, 0);
 
 	rc = hpsa_pci_init(h);
 	if (rc)
-		goto clean2;	/* lockup, wq/aer/h */
+		goto clean2;	/* lockup, aer/h */
 
 	sprintf(h->devname, HPSA "%d", number_of_controllers);
 	h->ctlr = number_of_controllers;
@@ -7727,7 +7715,7 @@  reinit_after_soft_reset:
 			dac = 0;
 		} else {
 			dev_err(&pdev->dev, "no suitable DMA available\n");
-			goto clean3;	/* pci, lockup, wq/aer/h */
+			goto clean3;	/* pci, lockup, aer/h */
 		}
 	}
 
@@ -7736,16 +7724,16 @@  reinit_after_soft_reset:
 
 	rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
 	if (rc)
-		goto clean3;	/* pci, lockup, wq/aer/h */
+		goto clean3;	/* pci, lockup, aer/h */
 	dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
 	       h->devname, pdev->device,
 	       h->intr[h->intr_mode], dac ? "" : " not");
 	rc = hpsa_alloc_cmd_pool(h);
 	if (rc)
-		goto clean4;	/* irq, pci, lockup, wq/aer/h */
+		goto clean4;	/* irq, pci, lockup, aer/h */
 	rc = hpsa_alloc_sg_chain_blocks(h);
 	if (rc)
-		goto clean5;	/* cmd, irq, pci, lockup, wq/aer/h */
+		goto clean5;	/* cmd, irq, pci, lockup, aer/h */
 	init_waitqueue_head(&h->scan_wait_queue);
 	init_waitqueue_head(&h->abort_cmd_wait_queue);
 	init_waitqueue_head(&h->abort_sync_wait_queue);
@@ -7758,7 +7746,20 @@  reinit_after_soft_reset:
 	spin_lock_init(&h->devlock);
 	rc = hpsa_put_ctlr_into_performant_mode(h);
 	if (rc)
-		goto clean6;	/* sg, cmd, irq, pci, lockup, wq/aer/h */
+		goto clean6;	/* sg, cmd, irq, pci, lockup, aer/h */
+
+	/* create the resubmit workqueue */
+	h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
+	if (!h->rescan_ctlr_wq) {
+		rc = -ENOMEM;
+		goto clean7;
+	}
+
+	h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
+	if (!h->resubmit_wq) {
+		rc = -ENOMEM;
+		goto clean7;	/* aer/h */
+	}
 
 	/*
 	 * At this point, the controller is ready to take commands.
@@ -7800,7 +7801,7 @@  reinit_after_soft_reset:
 		rc = hpsa_kdump_soft_reset(h);
 		if (rc)
 			/* Neither hard nor soft reset worked, we're hosed. */
-			goto clean7;
+			goto clean8;
 
 		dev_info(&h->pdev->dev, "Board READY.\n");
 		dev_info(&h->pdev->dev,
@@ -7837,7 +7838,7 @@  reinit_after_soft_reset:
 	hpsa_hba_inquiry(h);
 	rc = hpsa_register_scsi(h);	/* hook ourselves into SCSI subsystem */
 	if (rc)
-		goto clean7;
+		goto clean8; /* wq, perf, sg, cmd, irq, pci, lockup, aer/h */
 
 	/* Monitor the controller for firmware lockups */
 	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
@@ -7849,19 +7850,20 @@  reinit_after_soft_reset:
 				h->heartbeat_sample_interval);
 	return 0;
 
-clean7: /* perf, sg, cmd, irq, pci, lockup, wq/aer/h */
+clean8: /* perf, sg, cmd, irq, pci, lockup, aer/h */
 	kfree(h->hba_inquiry_data);
+clean7: /* perf, sg, cmd, irq, pci, lockup, aer/h */
 	hpsa_free_performant_mode(h);
 	h->access.set_intr_mask(h, HPSA_INTR_OFF);
 clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
 	hpsa_free_sg_chain_blocks(h);
-clean5: /* cmd, irq, pci, lockup, wq/aer/h */
+clean5: /* cmd, irq, pci, lockup, aer/h */
 	hpsa_free_cmd_pool(h);
-clean4: /* irq, pci, lockup, wq/aer/h */
+clean4: /* irq, pci, lockup, aer/h */
 	hpsa_free_irqs(h);
-clean3: /* pci, lockup, wq/aer/h */
+clean3: /* pci, lockup, aer/h */
 	hpsa_free_pci_init(h);
-clean2: /* lockup, wq/aer/h */
+clean2: /* lockup, aer/h */
 	if (h->lockup_detected) {
 		free_percpu(h->lockup_detected);
 		h->lockup_detected = NULL;
@@ -7960,9 +7962,9 @@  static void hpsa_remove_one(struct pci_dev *pdev)
 
 	hpsa_free_device_info(h);		/* scan */
 
-	hpsa_unregister_scsi(h);			/* init_one "8" */
-	kfree(h->hba_inquiry_data);			/* init_one "8" */
-	h->hba_inquiry_data = NULL;			/* init_one "8" */
+	hpsa_unregister_scsi(h);			/* init_one 9 */
+	kfree(h->hba_inquiry_data);			/* init_one 9 */
+	h->hba_inquiry_data = NULL;			/* init_one 9 */
 	hpsa_free_performant_mode(h);			/* init_one 7 */
 	hpsa_free_sg_chain_blocks(h);			/* init_one 6 */
 	hpsa_free_cmd_pool(h);				/* init_one 5 */