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path: root/drivers/ide/tx4939ide.c
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Diffstat (limited to 'drivers/ide/tx4939ide.c')
-rw-r--r--drivers/ide/tx4939ide.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index bafb7d1a22e..30d0d256230 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;