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kernel
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Fix buffer deletion problem with multi-sector writes. 

git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@611 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2003-06-17 08:38:20 +00:00
parent aebf17f959
commit a4abd642bf
3 changed files with 7 additions and 4 deletions
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7
kernel/blockio.c
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@ -155,7 +155,7 @@ STATIC struct buffer FAR *searchblock(ULONG blkno, COUNT dsk)
return bp; return bp;
} }
BOOL DeleteBlockInBufferCache(ULONG blknolow, ULONG blknohigh, COUNT dsk) BOOL DeleteBlockInBufferCache(ULONG blknolow, ULONG blknohigh, COUNT dsk, int mode)
{ {
struct buffer FAR *bp = firstbuf; struct buffer FAR *bp = firstbuf;
@ -168,7 +168,10 @@ BOOL DeleteBlockInBufferCache(ULONG blknolow, ULONG blknohigh, COUNT dsk)
bp->b_blkno <= blknohigh && bp->b_blkno <= blknohigh &&
(bp->b_flag & BFR_VALID) && (bp->b_unit == dsk)) (bp->b_flag & BFR_VALID) && (bp->b_unit == dsk))
{ {
flush1(bp); if (mode == XFR_READ)
flush1(bp);
else
bp->b_flag = 0;
} }
bp = b_next(bp); bp = b_next(bp);
} }

2
kernel/fatfs.c
View File

@ -1706,7 +1706,7 @@ UCOUNT rwblock(COUNT fd, VOID FAR * buffer, UCOUNT count, int mode)
DeleteBlockInBufferCache(currentblock, DeleteBlockInBufferCache(currentblock,
currentblock + sectors_to_xfer - 1, currentblock + sectors_to_xfer - 1,
fnp->f_dpb->dpb_unit); fnp->f_dpb->dpb_unit, mode);
if (dskxfer(fnp->f_dpb->dpb_unit, if (dskxfer(fnp->f_dpb->dpb_unit,
currentblock, currentblock,

2
kernel/proto.h
View File

@ -41,7 +41,7 @@ VOID setinvld(REG COUNT dsk);
BOOL flush_buffers(REG COUNT dsk); BOOL flush_buffers(REG COUNT dsk);
BOOL flush(void); BOOL flush(void);
BOOL fill(REG struct buffer FAR * bp, ULONG blkno, COUNT dsk); BOOL fill(REG struct buffer FAR * bp, ULONG blkno, COUNT dsk);
BOOL DeleteBlockInBufferCache(ULONG blknolow, ULONG blknohigh, COUNT dsk); BOOL DeleteBlockInBufferCache(ULONG blknolow, ULONG blknohigh, COUNT dsk, int mode);
/* *** Changed on 9/4/00 BER */ /* *** Changed on 9/4/00 BER */
UWORD dskxfer(COUNT dsk, ULONG blkno, VOID FAR * buf, UWORD numblocks, UWORD dskxfer(COUNT dsk, ULONG blkno, VOID FAR * buf, UWORD numblocks,
COUNT mode); COUNT mode);