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[SCSI] mpt2sas: Delete volume before HBA detach.

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The driver hangs when doing `rmmod mpt2sas` if there are any
IR volumes present.The hang is due the scsi midlayer trying to access the
IR volumes after the driver releases controller resources.  Perhaps when
scsi_remove_host is called,the scsi mid layer is sending some request.
This doesn't occur for bare drives becuase the driver is already reporting
those drives deleted prior to calling mpt2sas_base_detach.
To solve this issue, we need to delete the volumes as well.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2009-12-16 18:50:06 +05:30 committed by James Bottomley
parent 0f88009d5c
commit d7384b28af
1 changed files with 17 additions and 0 deletions
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17
drivers/scsi/mpt2sas/mpt2sas_scsih.c
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@ -5998,6 +5998,8 @@ _scsih_remove(struct pci_dev *pdev)
struct _sas_port *mpt2sas_port; struct _sas_port *mpt2sas_port;
struct _sas_device *sas_device; struct _sas_device *sas_device;
struct _sas_node *expander_sibling; struct _sas_node *expander_sibling;
struct _raid_device *raid_device, *next;
struct MPT2SAS_TARGET *sas_target_priv_data;
struct workqueue_struct *wq; struct workqueue_struct *wq;
unsigned long flags; unsigned long flags;
@ -6011,6 +6013,21 @@ _scsih_remove(struct pci_dev *pdev)
if (wq) if (wq)
destroy_workqueue(wq); destroy_workqueue(wq);
/* release all the volumes */
list_for_each_entry_safe(raid_device, next, &ioc->raid_device_list,
list) {
if (raid_device->starget) {
sas_target_priv_data =
raid_device->starget->hostdata;
sas_target_priv_data->deleted = 1;
scsi_remove_target(&raid_device->starget->dev);
}
printk(MPT2SAS_INFO_FMT "removing handle(0x%04x), wwid"
"(0x%016llx)\n", ioc->name, raid_device->handle,
(unsigned long long) raid_device->wwid);
_scsih_raid_device_remove(ioc, raid_device);
}
/* free ports attached to the sas_host */ /* free ports attached to the sas_host */
retry_again: retry_again:
list_for_each_entry(mpt2sas_port, list_for_each_entry(mpt2sas_port,