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hpsa: fix rmmod issues

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The driver is calling hpsa_shutdown before calling scsi_remove_host.
hpsa_shutdown is disabling interrupts.

scsi_remove_host can trigger I/O operations, such as
SYNCHRONIZE CACHE when multipath is enabled which hang the system.

Call scsi_remove_host before calling hpsa_shutdown.

Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Don Brace 2015-07-18 11:13:15 -05:00 committed by James Bottomley
parent 9a4178b76a
commit 2d041306b6
1 changed files with 8 additions and 2 deletions
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10
drivers/scsi/hpsa.c
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@ -8272,6 +8272,14 @@ static void hpsa_remove_one(struct pci_dev *pdev)
destroy_workqueue(h->rescan_ctlr_wq);
destroy_workqueue(h->resubmit_wq);
/*
* Call before disabling interrupts.
* scsi_remove_host can trigger I/O operations especially
* when multipath is enabled. There can be SYNCHRONIZE CACHE
* operations which cannot complete and will hang the system.
*/
if (h->scsi_host)
scsi_remove_host(h->scsi_host); /* init_one 8 */
/* includes hpsa_free_irqs - init_one 4 */
/* includes hpsa_disable_interrupt_mode - pci_init 2 */
hpsa_shutdown(pdev);
@ -8280,8 +8288,6 @@ static void hpsa_remove_one(struct pci_dev *pdev)
kfree(h->hba_inquiry_data); /* init_one 10 */
h->hba_inquiry_data = NULL; /* init_one 10 */
if (h->scsi_host)
scsi_remove_host(h->scsi_host); /* init_one 8 */
hpsa_free_ioaccel2_sg_chain_blocks(h);
hpsa_free_performant_mode(h); /* init_one 7 */
hpsa_free_sg_chain_blocks(h); /* init_one 6 */