libata: kill qc->nsect and cursect

libata used two separate sets of variables to record request size and
current offset for ATA and ATAPI.  This is confusing and fragile.
This patch replaces qc->nsect/cursect with qc->nbytes/curbytes and
kills them.  Also, ata_pio_sector() is updated to use bytes for
qc->cursg_ofs instead of sectors.  The field used to be used in bytes
for ATAPI and in sectors for ATA.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1 insertions, 5 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index a8ecaaad55ff..a2458dfefb17 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -427,9 +427,6 @@ struct ata_queued_cmd {
 
         unsigned int            pad_len;
 
-        unsigned int            nsect;
-        unsigned int            cursect;
-
         unsigned int            nbytes;
         unsigned int            curbytes;
 
@@ -1145,8 +1142,7 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
         qc->dma_dir = DMA_NONE;
         qc->__sg = NULL;
         qc->flags = 0;
-        qc->cursect = qc->cursg = qc->cursg_ofs = 0;
-        qc->nsect = 0;
+        qc->cursg = qc->cursg_ofs = 0;
         qc->nbytes = qc->curbytes = 0;
         qc->n_elem = 0;
         qc->err_mask = 0;