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xtensa: fix address checks in dma_{alloc,free}_coherent
authorAlan Douglas <adouglas@cadence.com>
Wed, 23 Jul 2014 10:06:40 +0000 (14:06 +0400)
committerMax Filippov <jcmvbkbc@gmail.com>
Thu, 14 Aug 2014 07:59:14 +0000 (11:59 +0400)
commit1ca49463c44c970b1ab1d71b0f268bfdf8427a7e
treec6ece6e5481ac4a06803bc6ed8a2b7f8d3d653aetree | snapshot
parentf61bf8e7d19e0a3456a7a9ed97c399e4353698dccommit | diff
xtensa: fix address checks in dma_{alloc,free}_coherent

Virtual address is translated to the XCHAL_KSEG_CACHED region in the
dma_free_coherent, but is checked to be in the 0...XCHAL_KSEG_SIZE
range.

Change check for end of the range from 'addr >= X' to 'addr > X - 1' to
handle the case of X == 0.

Replace 'if (C) BUG();' construct with 'BUG_ON(C);'.

Cc: stable@vger.kernel.org
Signed-off-by: Alan Douglas <adouglas@cadence.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
arch/xtensa/kernel/pci-dma.c diff | blob | history
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