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esp.c: update TC check logic in do_dma_pdma_cb() to check for TC == 0

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Invert the logic so that the end of DMA transfer check becomes one that checks
for TC == 0 in the from device path in do_dma_pdma_cb().

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Helge Deller <deller@gmx.de>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20240112125420.514425-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland 2024-01-12 12:53:01 +00:00
parent f21fe39d9c
commit 0f2eb11071
1 changed files with 11 additions and 13 deletions
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24
hw/scsi/esp.c
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@ -602,21 +602,19 @@ static void do_dma_pdma_cb(ESPState *s)
return;
}
if (esp_get_tc(s) != 0) {
/* Copy device data to FIFO */
len = MIN(s->async_len, esp_get_tc(s));
len = MIN(len, fifo8_num_free(&s->fifo));
fifo8_push_all(&s->fifo, s->async_buf, len);
s->async_buf += len;
s->async_len -= len;
s->ti_size -= len;
esp_set_tc(s, esp_get_tc(s) - len);
return;
if (esp_get_tc(s) == 0) {
esp_lower_drq(s);
esp_dma_done(s);
}
/* Partially filled a scsi buffer. Complete immediately. */
esp_lower_drq(s);
esp_dma_done(s);
/* Copy device data to FIFO */
len = MIN(s->async_len, esp_get_tc(s));
len = MIN(len, fifo8_num_free(&s->fifo));
fifo8_push_all(&s->fifo, s->async_buf, len);
s->async_buf += len;
s->async_len -= len;
s->ti_size -= len;
esp_set_tc(s, esp_get_tc(s) - len);
}
}