From 2d041306b669e281427de7dd398e74335c9f5042 Mon Sep 17 00:00:00 2001 From: Don Brace Date: Sat, 18 Jul 2015 11:13:15 -0500 Subject: [PATCH] hpsa: fix rmmod issues 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 Reviewed-by: Scott Teel Reviewed-by: Tomas Henzl Signed-off-by: Don Brace Signed-off-by: James Bottomley --- drivers/scsi/hpsa.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 3f1c2a88b204..40669f8dd0df 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -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 */ -- 2.20.1