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[PATCH] pci_iomap_regions() error handling fix

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It appears that the pcim_iomap_regions() function doesn't get the error
handling right. It BUGs early at boot with a backtrace along the lines of:

ahci_init
pci_register_driver
driver_register
[...]
ahci_init_one
pcim_iomap_region
pcim_iounmap

The following patch allows me to boot. Only the if(mask..) continue;
part fixes the problem actually, the gotos where changed so that we
don't try to unmap something we couldn't map anyway.

Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Frederik Deweerdt 2007-02-16 01:27:15 -08:00 committed by Linus Torvalds
parent f5de611148
commit fb4d64e78c
1 changed files with 4 additions and 4 deletions
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8
lib/devres.c
View file

@ -274,21 +274,21 @@ int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name)
rc = pci_request_region(pdev, i, name);
if (rc)
goto err_region;
goto err_inval;
rc = -ENOMEM;
if (!pcim_iomap(pdev, i, 0))
goto err_iomap;
goto err_region;
}
return 0;
err_iomap:
pcim_iounmap(pdev, iomap[i]);
err_region:
pci_release_region(pdev, i);
err_inval:
while (--i >= 0) {
if (!(mask & (1 << i)))
continue;
pcim_iounmap(pdev, iomap[i]);
pci_release_region(pdev, i);
}