diff options
| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2008-12-29 20:27:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-18 10:43:45 -0800 |
| commit | 7ee9f07eca4a37c099dec3c700dfb3322320f5a3 (patch) | |
| tree | 85c7e41c177f27f36945ce1d14e15ebeda0d3dd6 /drivers | |
| parent | cb3a9af9f9ceb5cf4b1b530c7101f6350fe000f9 (diff) | |
tx4939ide: Do not use zero count PRD entry
commit a0fce792b55b260589c3d77293a224e84395ec07 upstream.
This fixes data corruption on some heavy load.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: sshtylyov@ru.mvista.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ide/tx4939ide.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c index bb5a26bfc871..97cd9e0f66f6 100644 --- a/drivers/ide/tx4939ide.c +++ b/drivers/ide/tx4939ide.c @@ -259,6 +259,12 @@ static int tx4939ide_build_dmatable(ide_drive_t *drive, struct request *rq) bcount = 0x10000 - (cur_addr & 0xffff); if (bcount > cur_len) bcount = cur_len; + /* + * This workaround for zero count seems required. + * (standard ide_build_dmatable do it too) + */ + if ((bcount & 0xffff) == 0x0000) + bcount = 0x8000; *table++ = bcount & 0xffff; *table++ = cur_addr; cur_addr += bcount; |