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author | Sricharan R <sricharan@codeaurora.org> | 2017-04-10 16:51:00 +0530 |
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committer | Joerg Roedel <jroedel@suse.de> | 2017-04-20 16:31:06 +0200 |
commit | efc8551a276faab19d85079da02c5fb602b0dcbe (patch) | |
tree | d4bc742878d00fba40a4b2de45eedbac7ae1aa5c /drivers/base | |
parent | 1d9029d440e40b276c0691caed1de10c42d96bef (diff) | |
download | linux-efc8551a276faab19d85079da02c5fb602b0dcbe.tar.bz2 |
of: device: Fix overflow of coherent_dma_mask
Size of the dma-range is calculated as coherent_dma_mask + 1
and passed to arch_setup_dma_ops further. It overflows when
the coherent_dma_mask is set for full 64 bits 0xFFFFFFFFFFFFFFFF,
resulting in size getting passed as 0 wrongly. Fix this by
passsing in max(mask, mask + 1). Note that in this case
when the mask is set to full 64bits, we will be passing the mask
itself to arch_setup_dma_ops instead of the size. The real fix
for this should be to make arch_setup_dma_ops receive the
mask and handle it, to be done in the future.
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/base')
0 files changed, 0 insertions, 0 deletions