[libata] fix bugs in ATAPI padding DMA mapping code

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The ATAPI pad-to-next-32bit-boundary code modifies the scatterlist's
length variable, sometimes to zero.  x86-64 platform would oops if a
zero-length scatterlist entry was asked to be mapped.  Work around this
by ensuring that we never DMA-map a zero length buffer or SG entry.

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This commit is contained in:

Jeff Garzik 2005-11-14 14:06:26 -05:00

parent ad36d1a533

commit e1410f2d95

1 changed files with 26 additions and 5 deletions

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31

drivers/scsi/libata-core.c

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