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[SCSI] ipr: reorder error handling code to include iounmap

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The out_msi_disable label should be before cleanup_nomem to additionally
benefit from the call to iounmap.  Subsequent gotos are adjusted to go to
out_msi_disable instead of cleanup_nomem, which now follows it.  This is
safe because pci_disable_msi does nothing if pci_enable_msi was not called.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r@
expression e1,e2;
statement S;
@@

e1 = pci_ioremap_bar(...);
... when != e1 = e2
    when != iounmap(e1)
    when any
(
 if (<+...e1...+>) S
|
 if(...) { ... return 0; }
|
 if (...) { ... when != iounmap(e1)
                when != if (...) { ... iounmap(e1) ... }
* return ...;
 } else S
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Julia Lawall 2011-07-11 14:08:25 -07:00 committed by James Bottomley
parent b5b515445f
commit f170c684b5
1 changed files with 6 additions and 6 deletions
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12
drivers/scsi/ipr.c
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@ -8778,14 +8778,14 @@ static int __devinit ipr_probe_ioa(struct pci_dev *pdev,
if (rc != PCIBIOS_SUCCESSFUL) {
dev_err(&pdev->dev, "Failed to save PCI config space\n");
rc = -EIO;
goto cleanup_nomem;
goto out_msi_disable;
}
if ((rc = ipr_save_pcix_cmd_reg(ioa_cfg)))
goto cleanup_nomem;
goto out_msi_disable;
if ((rc = ipr_set_pcix_cmd_reg(ioa_cfg)))
goto cleanup_nomem;
goto out_msi_disable;
if (ioa_cfg->sis64)
ioa_cfg->cfg_table_size = (sizeof(struct ipr_config_table_hdr64)
@ -8800,7 +8800,7 @@ static int __devinit ipr_probe_ioa(struct pci_dev *pdev,
if (rc < 0) {
dev_err(&pdev->dev,
"Couldn't allocate enough memory for device driver!\n");
goto cleanup_nomem;
goto out_msi_disable;
}
/*
@ -8845,10 +8845,10 @@ out:
cleanup_nolog:
ipr_free_mem(ioa_cfg);
cleanup_nomem:
iounmap(ipr_regs);
out_msi_disable:
pci_disable_msi(pdev);
cleanup_nomem:
iounmap(ipr_regs);
out_release_regions:
pci_release_regions(pdev);
out_scsi_host_put: