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ide: kill ide_dma_submit_check

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Merge ide_dma_submit_check into it's only caller.  Also use tail recursion
using a goto instead of a real recursion - this avoid overflowing the
stack in the pathological situation of an recurring error that is ignored.
We'll still be busy looping in ide_dma_cb, but at least won't eat up
all stack space after this.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Christoph Hellwig 2010-12-20 13:46:09 +01:00 committed by Kevin Wolf
parent 596bb44dea
commit c641483fbe
1 changed files with 6 additions and 9 deletions
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15
hw/ide/core.c
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@ -321,14 +321,6 @@ static inline void ide_abort_command(IDEState *s)
s->error = ABRT_ERR;
}
static inline void ide_dma_submit_check(IDEState *s,
BlockDriverCompletionFunc *dma_cb)
{
if (s->bus->dma->aiocb)
return;
dma_cb(s, -1);
}
/* prepare data transfer and tell what to do after */
static void ide_transfer_start(IDEState *s, uint8_t *buf, int size,
EndTransferFunc *end_transfer_func)
@ -493,6 +485,7 @@ void ide_dma_cb(void *opaque, int ret)
int n;
int64_t sector_num;
handle_rw_error:
if (ret < 0) {
int op = BM_STATUS_DMA_RETRY;
@ -538,7 +531,11 @@ void ide_dma_cb(void *opaque, int ret)
s->bus->dma->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num,
ide_dma_cb, s);
}
ide_dma_submit_check(s, ide_dma_cb);
if (!s->bus->dma->aiocb) {
ret = -1;
goto handle_rw_error;
}
return;
eot: