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[SCSI] mpt2sas: fix cleanup on controller resource mapping failure

Browse Source 
If mpt2sas_base_map_resources takes an early error path then its
counterpart, mpt2sas_base_free_resources needs to be careful about
cleaning up:

  1 - _base_mask_interrupts and _base_make_ioc_ready require memory
      mapped I/O registers, make sure that this is true.

  2 - _base_free_irq iterates over the adapter's reply_queue_list, so
      move this list head initialization out of _base_enable_msix to
      _scsih_probe so this will always be safe.

  3 - check that the controller PCI device and its BARs have been
      enabled before disabling them.

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Joe Lawrence 2013-08-08 16:45:38 -04:00 committed by James Bottomley
parent 279afdfe78
commit 3b3e6f8df3
2 changed files with 18 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/scsi/mpt2sas/mpt2sas_base.c
View File

@ -1409,8 +1409,6 @@ _base_enable_msix(struct MPT2SAS_ADAPTER *ioc)
int i;
u8 try_msix = 0;
INIT_LIST_HEAD(&ioc->reply_queue_list);
if (msix_disable == -1 || msix_disable == 0)
try_msix = 1;
@ -1489,6 +1487,7 @@ mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc)
if (pci_enable_device_mem(pdev)) {
printk(MPT2SAS_WARN_FMT "pci_enable_device_mem: "
"failed\n", ioc->name);
ioc->bars = 0;
return -ENODEV;
}
@ -1497,6 +1496,7 @@ mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc)
MPT2SAS_DRIVER_NAME)) {
printk(MPT2SAS_WARN_FMT "pci_request_selected_regions: "
"failed\n", ioc->name);
ioc->bars = 0;
r = -ENODEV;
goto out_fail;
}
@ -4229,18 +4229,25 @@ mpt2sas_base_free_resources(struct MPT2SAS_ADAPTER *ioc)
dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
__func__));
_base_mask_interrupts(ioc);
ioc->shost_recovery = 1;
_base_make_ioc_ready(ioc, CAN_SLEEP, SOFT_RESET);
ioc->shost_recovery = 0;
if (ioc->chip_phys && ioc->chip) {
_base_mask_interrupts(ioc);
ioc->shost_recovery = 1;
_base_make_ioc_ready(ioc, CAN_SLEEP, SOFT_RESET);
ioc->shost_recovery = 0;
}
_base_free_irq(ioc);
_base_disable_msix(ioc);
if (ioc->chip_phys)
if (ioc->chip_phys && ioc->chip)
iounmap(ioc->chip);
ioc->chip_phys = 0;
pci_release_selected_regions(ioc->pdev, ioc->bars);
pci_disable_pcie_error_reporting(pdev);
pci_disable_device(pdev);
if (pci_is_enabled(pdev)) {
pci_release_selected_regions(ioc->pdev, ioc->bars);
pci_disable_pcie_error_reporting(pdev);
pci_disable_device(pdev);
}
return;
}

1
drivers/scsi/mpt2sas/mpt2sas_scsih.c
View File

@ -8175,6 +8175,7 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
INIT_LIST_HEAD(&ioc->sas_hba.sas_port_list);
INIT_LIST_HEAD(&ioc->delayed_tr_list);
INIT_LIST_HEAD(&ioc->delayed_tr_volume_list);
INIT_LIST_HEAD(&ioc->reply_queue_list);
/* init shost parameters */
shost->max_cmd_len = 32;