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ide: make ide_transfer_stop idempotent 

There is code checking s->end_transfer_func and it was not taught about
ide_transfer_cancel.  We can just use ide_transfer_stop because
s->end_transfer_func is only ever called in the DRQ phase.

ide_transfer_cancel can then be removed, since it would just be
calling ide_transfer_halt.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180606190955.20845-6-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Paolo Bonzini 2018-06-06 15:09:53 -04:00 committed by John Snow
parent ee4cd662ad
commit 882941a568
1 changed files with 4 additions and 10 deletions
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14
hw/ide/core.c
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@ -547,10 +547,9 @@ static void ide_cmd_done(IDEState *s)
}
}
static void ide_transfer_halt(IDEState *s,
void(*end_transfer_func)(IDEState *))
static void ide_transfer_halt(IDEState *s)
{
s->end_transfer_func = end_transfer_func;
s->end_transfer_func = ide_transfer_stop;
s->data_ptr = s->io_buffer;
s->data_end = s->io_buffer;
s->status &= ~DRQ_STAT;
@ -558,15 +557,10 @@ static void ide_transfer_halt(IDEState *s,
void ide_transfer_stop(IDEState *s)
{
ide_transfer_halt(s, ide_transfer_stop);
ide_transfer_halt(s);
ide_cmd_done(s);
}
static void ide_transfer_cancel(IDEState *s)
{
ide_transfer_halt(s, ide_transfer_cancel);
}
int64_t ide_get_sector(IDEState *s)
{
int64_t sector_num;
@ -1361,7 +1355,7 @@ static bool cmd_nop(IDEState *s, uint8_t cmd)
static bool cmd_device_reset(IDEState *s, uint8_t cmd)
{
/* Halt PIO (in the DRQ phase), then DMA */
ide_transfer_cancel(s);
ide_transfer_halt(s);
ide_cancel_dma_sync(s);
/* Reset any PIO commands, reset signature, etc */