IDE: Do not flush empty CDROM drives
The block backend changed in a way that flushing empty CDROM drives now crashes. Amend IDE to avoid doing so until the root problem can be addressed for 2.11. Original patch by John Snow <jsnow@redhat.com>. Reported-by: Kieron Shorrock <kshorrock@paloaltonetworks.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20170809160212.29976-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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@ -1063,7 +1063,15 @@ static void ide_flush_cache(IDEState *s)
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s->status |= BUSY_STAT;
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s->status |= BUSY_STAT;
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ide_set_retry(s);
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ide_set_retry(s);
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block_acct_start(blk_get_stats(s->blk), &s->acct, 0, BLOCK_ACCT_FLUSH);
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block_acct_start(blk_get_stats(s->blk), &s->acct, 0, BLOCK_ACCT_FLUSH);
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s->pio_aiocb = blk_aio_flush(s->blk, ide_flush_cb, s);
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if (blk_bs(s->blk)) {
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s->pio_aiocb = blk_aio_flush(s->blk, ide_flush_cb, s);
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} else {
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/* XXX blk_aio_flush() crashes when blk_bs(blk) is NULL, remove this
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* temporary workaround when blk_aio_*() functions handle NULL blk_bs.
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*/
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ide_flush_cb(s, 0);
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}
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}
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}
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static void ide_cfata_metadata_inquiry(IDEState *s)
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static void ide_cfata_metadata_inquiry(IDEState *s)
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