diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2010-11-26 16:36:16 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-11-29 16:15:04 +0100 |
| commit | b76876e602ca09ff848d99595a506feb1fd54ff4 (patch) | |
| tree | 858d01d505b6c24042ca9f7d4637fb909cd3401f /hw/ide | |
| parent | c29947bbb0978d312074ec73be968bfab1b6c977 (diff) | |
| download | qemu-b76876e602ca09ff848d99595a506feb1fd54ff4.zip qemu-b76876e602ca09ff848d99595a506feb1fd54ff4.tar.gz qemu-b76876e602ca09ff848d99595a506feb1fd54ff4.tar.bz2 | |
ide: Reset current_addr after stopping DMA
Whenever SSBM is reset in the command register all state information is lost.
Restarting DMA means that current_addr must be reset to the base address of the
PRD table. The OS is not required to change the base address register before
starting a DMA operation, it can reuse the value it wrote for an earlier
request.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'hw/ide')
| -rw-r--r-- | hw/ide/pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/ide/pci.c b/hw/ide/pci.c index 404f045..ad406ee 100644 --- a/hw/ide/pci.c +++ b/hw/ide/pci.c @@ -65,6 +65,7 @@ void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) #endif } } else { + bm->cur_addr = bm->addr; if (!(bm->status & BM_STATUS_DMAING)) { bm->status |= BM_STATUS_DMAING; /* start dma transfer if possible */ @@ -101,7 +102,6 @@ static void bmdma_addr_write(IORange *ioport, uint64_t addr, #endif bm->addr &= ~(mask << shift); bm->addr |= ((data & mask) << shift) & ~3; - bm->cur_addr = bm->addr; } const IORangeOps bmdma_addr_ioport_ops = { |