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Increment the disk block offset after writing, not before. This

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fixes filesystem corruption when nextboot.conf is located after
cylinder 1023. The bug appears to have been introduced at the time
bd_read was copied to create bd_write.

PR:		bin/98005
Reported by:	yar
MFC after:	1 week
This commit is contained in:
Ian Dowse 2006-05-31 09:05:49 +00:00
parent fd447da171
commit 9c0ce099e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=159096
1 changed files with 3 additions and 3 deletions
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6
sys/boot/i386/libi386/biosdisk.c
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@ -1037,9 +1037,6 @@ bd_write(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
*/
if (bbuf != NULL)
bcopy(p, breg, x * BIOSDISK_SECSIZE);
p += (x * BIOSDISK_SECSIZE);
dblk += x;
resid -= x;
/* Loop retrying the operation a couple of times. The BIOS may also retry. */
for (retry = 0; retry < 3; retry++) {
@ -1103,6 +1100,9 @@ bd_write(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
if (result) {
return(-1);
}
p += (x * BIOSDISK_SECSIZE);
dblk += x;
resid -= x;
}
/* hexdump(dest, (blks * BIOSDISK_SECSIZE)); */