From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 13 Mar 2013 15:53:06 +0000 (+0100)
Subject: ide: Reset BMIDEA bit when the bus master is stopped
X-Git-Tag: v1.5.0-rc1~1^2~7
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b39f96126549e2834152211a99919917423d2212;p=thirdparty%2Fqemu.git

ide: Reset BMIDEA bit when the bus master is stopped

The device is supposed to reset the Bus Master IDE Active bit in the
status register when 0 is written to the Start/Stop Bus Master bit in
the command register.

In the common cases this happens automatically because bdrv_drain_all()
flushes the requests, but with a large PRDT it could remain set.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---

diff --git a/hw/ide/pci.c b/hw/ide/pci.c
index a310975391f..635a364dd86 100644
--- a/hw/ide/pci.c
+++ b/hw/ide/pci.c
@@ -312,6 +312,7 @@ void bmdma_cmd_writeb(BMDMAState *bm, uint32_t val)
                 bdrv_drain_all();
                 assert(bm->bus->dma->aiocb == NULL);
             }
+            bm->status &= ~BM_STATUS_DMAING;
         } else {
             bm->cur_addr = bm->addr;
             if (!(bm->status & BM_STATUS_DMAING)) {