| commit | b76876e602ca09ff848d99595a506feb1fd54ff4 | |
| author | Kevin Wolf <kwolf@redhat.com> | |
| Fri, 26 Nov 2010 15:36:16 +0000 (26 16:36 +0100) | ||
| committer | Kevin Wolf <kwolf@redhat.com> | |
| Mon, 29 Nov 2010 15:15:04 +0000 (29 16:15 +0100) | ||
| tree | 858d01d505b6c24042ca9f7d4637fb909cd3401f | treesnapshot (tar.gz zip) |
| parent | c29947bbb0978d312074ec73be968bfab1b6c977 | commitdiff |
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>
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>
| hw/ide/pci.c | diffblobblamehistory |