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build_request_buffer:

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Don't bzero the buffer structure, it's been done already by
  allocrqg.

sdio:
  Build up a correct buffer header, don't steal linkages from system
  buffer headers.

Noticed-by: mckusick
This commit is contained in:
Greg Lehey 1999-06-24 08:56:03 +00:00
parent 49fc4f3ffa
commit e7066f7303
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=48181
1 changed files with 13 additions and 5 deletions
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18
sys/dev/vinum/vinumrequest.c
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@ -724,7 +724,6 @@ build_rq_buffer(struct rqelement *rqe, struct plex *plex)
ubp = rqe->rqg->rq->bp; /* pointer to user buffer header */
/* Initialize the buf struct */
bzero(&rqe->b, sizeof(struct buf));
bp->b_flags = ubp->b_flags & (B_NOCACHE | B_READ | B_ASYNC); /* copy these flags from user bp */
bp->b_flags |= B_CALL | B_BUSY; /* inform us when it's done */
/*
@ -824,12 +823,21 @@ sdio(struct buf *bp)
biodone(bp);
return;
}
bcopy(bp, &sbp->b, sizeof(struct buf)); /* start with the user's buffer */
sbp->b.b_flags |= B_CALL; /* tell us when it's done */
sbp->b.b_iodone = sdio_done; /* here */
bzero(sbp, sizeof(struct sdbuf)); /* start with nothing */
/*
* XXX Should we check for reviving plexes here, and
* set B_ORDERED if so?
*/
sbp->b.b_flags = bp->b_flags | B_CALL; /* inform us when it's done */
sbp->b.b_bufsize = bp->b_bufsize; /* buffer size */
sbp->b.b_bcount = bp->b_bcount; /* number of bytes to transfer */
sbp->b.b_resid = bp->b_resid; /* and amount waiting */
sbp->b.b_dev = DRIVE[sd->driveno].vp->v_rdev; /* device */
sbp->b.b_data = bp->b_data; /* data buffer */
sbp->b.b_blkno = bp->b_blkno + sd->driveoffset;
sbp->b.b_iodone = sdio_done; /* come here on completion */
sbp->b.b_vp = DRIVE[sd->driveno].vp; /* vnode */
sbp->b.b_blkno += sd->driveoffset;
sbp->bp = bp; /* note the address of the original header */
sbp->sdno = sd->sdno; /* note for statistics */
sbp->driveno = sd->driveno;