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Detect the "EOF" condition. Specifically, end of partition.

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Submitted by:	Bruce Evans
This commit is contained in:
David Greenman 1994-08-08 13:53:55 +00:00
parent 8867d2f19c
commit 7d7bb69d41
2 changed files with 14 additions and 5 deletions
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14
sys/i386/isa/wd.c
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@ -37,7 +37,7 @@ static int wdtest = 0;
* SUCH DAMAGE.
*
* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
* $Id: wd.c,v 1.37 1994/04/10 11:17:13 csgr Exp $
* $Id: wd.c,v 1.39 1994/05/25 09:00:19 rgrimes Exp $
*/
/* TODO:
@ -86,7 +86,9 @@ static int wdtest = 0;
#define TIMEOUT 10000
#define RETRIES 5 /* number of retries before giving up */
#define RECOVERYTIME 500000 /* usec for controller to recover after err */
#define MAXTRANSFER 256 /* max size of transfer in sectors */
#define MAXTRANSFER 255 /* max size of transfer in sectors */
/* correct max is 256 but some controllers */
/* can't handle that in all cases */
#define BAD144_NO_CYL 0xffff /* XXX should be in dkbad.h; bad144.c uses -1 */
#ifdef notyet
@ -515,9 +517,13 @@ wdstart(int ctrlr)
if (du->dk_skip == 0) {
du->dk_bc = bp->b_bcount;
if (bp->b_flags & B_BAD) {
if (bp->b_flags & B_BAD
/*
* XXX handle large transfers inefficiently instead
* of crashing on them.
*/
|| howmany(du->dk_bc, DEV_BSIZE) > MAXTRANSFER)
du->dk_flags |= DKFL_SINGLE;
}
}
if ((du->dk_flags & (DKFL_SINGLE|DKFL_BADSECT)) /* 19 Aug 92*/

5
sys/kern/kern_physio.c
View File

@ -16,7 +16,7 @@
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: kern_physio.c,v 1.4 1994/08/06 09:15:28 davidg Exp $
* $Id: kern_physio.c,v 1.5 1994/08/07 13:10:31 davidg Exp $
*/
#include <sys/param.h>
@ -120,6 +120,9 @@ physio(strategy, bp, dev, rw, minp, uio)
*/
{
int iolen = bp->b_bcount - bp->b_resid;
if (iolen == 0 && !(bp->b_flags & B_ERROR))
goto doerror; /* EOF */
uio->uio_iov[i].iov_len -= iolen;
uio->uio_iov[i].iov_base += iolen;
uio->uio_resid -= iolen;