Date: Wed, 25 May 2005 07:25:12 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha busdma_machdep.c Message-ID: <200505250725.j4P7PCYR058390@repoman.freebsd.org>
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marcel 2005-05-25 07:25:12 UTC
FreeBSD src repository
Modified files:
sys/alpha/alpha busdma_machdep.c
Log:
For ISA DMA maps, the chipsets scatter/gather feature is used. As
such, the segments pointer in the DMA tag will always be NULL. In
bus_dmamap_load(), temporarily point the segments pointer in the
DMA tag to a local variable so that we don't dereference a NULL
pointer. Reset the segments pointer to NULL after calling the
callback function with it.
PR: alpha/30486
MFC after: 1 week
Revision Changes Path
1.51 +3 -0 src/sys/alpha/alpha/busdma_machdep.c
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