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authorOlof Johansson <olof@lixom.net>2005-06-13 15:52:27 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-13 20:58:58 -0700
commitf797f9cc5485b50c35c106b462e1bc432ec37f90 (patch)
tree283443fcdeb709c768ed5cd481203459b5222441 /kernel
parenta3c77c67a443e631febf708bb0c376caede31657 (diff)
[PATCH] Fix PCI BAR size interpretation on 64-bit arches
On 64-bit machines, PCI_BASE_ADDRESS_MEM_MASK and other mask constants passed to pci_size() are 64-bit (for example ~0x0fUL). However, pci_size does comparisons between the u32 arguments and the mask, which will fail even though any result from pci_size is still just 32-bit. Changing the mask argument to u32 seems the obvious thing to do, since all arithmetic in the function is 32-bit and having a larger mask makes no sense. This triggered on a PPC64 system here where an adapter (VGA, as it happened) had a memory region base of 0xfe000000 and a sz of the same, matching the if (max == maxbase ...) test at the bottom of pci_size but failing the mask comparison. Quite a corner case which I guess explains why we haven't seen it until now. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
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