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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2014-12-09 18:15:08 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-02-06 17:24:20 +0100 |
| commit | 819fa276311ce328a8e38ad9306c1093961b3f4b (patch) | |
| tree | c2c77e0df0838a77f2b29f850e2b6956711246da /hw | |
| parent | cebbae86b4f7ee3d3dd9df906b97d269e70d9cc7 (diff) | |
| download | qemu-819fa276311ce328a8e38ad9306c1093961b3f4b.zip qemu-819fa276311ce328a8e38ad9306c1093961b3f4b.tar.gz qemu-819fa276311ce328a8e38ad9306c1093961b3f4b.tar.bz2 | |
Restore atapi_dma flag across migration
If a migration happens just after the guest has kicked
off an ATAPI command and kicked off DMA, we lose the atapi_dma
flag, and the destination tries to complete the command as PIO
rather than DMA. This upsets Linux; modern libata based kernels
stumble and recover OK, older kernels end up passing bad data
to userspace.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ide/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/ide/core.c b/hw/ide/core.c index d4af5e2..ac3f015 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -2417,6 +2417,7 @@ static int ide_drive_pio_post_load(void *opaque, int version_id) s->end_transfer_func = transfer_end_table[s->end_transfer_fn_idx]; s->data_ptr = s->io_buffer + s->cur_io_buffer_offset; s->data_end = s->data_ptr + s->cur_io_buffer_len; + s->atapi_dma = s->feature & 1; /* as per cmd_packet */ return 0; } |