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| author | James Sewart <[email protected]> | 2019-12-10 15:51:33 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <[email protected]> | 2019-12-18 12:21:16 -0600 |
| commit | f8bf2aeb651b3460a4b36fd7ba1ba1d31777d35c (patch) | |
| tree | 202de2282e09e50ca722a0e65f336fee7c36a901 /scripts/gcc-plugins/randomize_layout_plugin.c | |
| parent | 8c386cc817878588195dde38e919aa6ba9409d58 (diff) | |
PCI: Fix pci_add_dma_alias() bitmask size
The number of possible devfns is 256, but pci_add_dma_alias() allocated a
bitmap of size 255. Fix this off-by-one error.
This fixes commits 338c3149a221 ("PCI: Add support for multiple DMA
aliases") and c6635792737b ("PCI: Allocate dma_alias_mask with
bitmap_zalloc()"), but I doubt it was possible to see a problem because
it takes 4 64-bit longs (or 8 32-bit longs) to hold 255 bits, and
bitmap_zalloc() doesn't save the 255-bit size anywhere.
[bhelgaas: commit log, move #define to drivers/pci/pci.h, include loop
limit fix from Qian Cai:
https://lore.kernel.org/r/[email protected]]
Signed-off-by: James Sewart <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Logan Gunthorpe <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/randomize_layout_plugin.c')
0 files changed, 0 insertions, 0 deletions