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| author | Tejun Heo <htejun@gmail.com> | 2007-12-05 16:43:10 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-01-23 05:24:14 -0500 |
| commit | f92a26365a72333f418abe82700c6030d4a1a807 (patch) | |
| tree | 73bb3ae684abfabf2d0aecac33af1a3f2112afc4 /drivers/scsi/libsas/sas_ata.c | |
| parent | 001102d7859be0e7f7b9f2d62b841f2c0f9c2640 (diff) | |
libata: change ATA_QCFLAG_DMAMAP semantics
ATA_QCFLAG_DMAMAP was a bit peculiar in that it got set during qc
initialization and cleared if DMA mapping wasn't necessary. Make it
more straight forward by making the following changes.
* Don't set it during initialization. Set it after DMA is actually
mapped.
* Add BUG_ON() to guarantee that there is data to transfer if DMAMAP
is set. This always holds for the current code. The BUG_ON() is
for docummentation and sanity check.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/scsi/libsas/sas_ata.c')
0 files changed, 0 insertions, 0 deletions