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| author | Tejun Heo <htejun@gmail.com> | 2008-03-18 17:47:43 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-03-24 22:09:12 -0400 |
| commit | aacda37538e7f9cf2148eedf3766239829e51ba4 (patch) | |
| tree | 0206d2db8ce636aadabf8e3effd1ee3114ccff2a /include/linux | |
| parent | cc7feea39bed2951cc29af3ad642f39a99dfe8d3 (diff) | |
| download | linux-aacda37538e7f9cf2148eedf3766239829e51ba4.tar.gz linux-aacda37538e7f9cf2148eedf3766239829e51ba4.tar.bz2 linux-aacda37538e7f9cf2148eedf3766239829e51ba4.zip | |
libata: implement ata_qc_raw_nbytes()
Implement ata_qc_raw_nbytes() which determines the raw user-requested
size of a PC command.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/libata.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index a05f60013642..269cdba09578 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -463,6 +463,7 @@ struct ata_queued_cmd { unsigned int sect_size; unsigned int nbytes; + unsigned int extrabytes; unsigned int curbytes; struct scatterlist *cursg; @@ -1336,6 +1337,11 @@ static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, return NULL; } +static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) +{ + return qc->nbytes - min(qc->extrabytes, qc->nbytes); +} + static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) { memset(tf, 0, sizeof(*tf)); @@ -1354,7 +1360,7 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc) qc->flags = 0; qc->cursg = NULL; qc->cursg_ofs = 0; - qc->nbytes = qc->curbytes = 0; + qc->nbytes = qc->extrabytes = qc->curbytes = 0; qc->n_elem = 0; qc->err_mask = 0; qc->sect_size = ATA_SECT_SIZE; |