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esp.c: remove unneeded if() check in esp_transfer_data() 

The following ti_cmd checks ensure that only DMA and non-DMA TI commmands will
can call into the esp_do_dma() and esp_do_nodma() callbacks.

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: <20240112125420.514425-27-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 12:53:18 +00:00
parent 81ed2ed3e8
commit fe082b5475
1 changed files with 7 additions and 10 deletions
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17
hw/scsi/esp.c
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@ -916,16 +916,13 @@ void esp_transfer_data(SCSIRequest *req, uint32_t len)
esp_raise_irq(s); esp_raise_irq(s);
} }
if (s->ti_cmd == 0) { /*
/* * Always perform the initial transfer upon reception of the next TI
* Always perform the initial transfer upon reception of the next TI * command to ensure the DMA/non-DMA status of the command is correct.
* command to ensure the DMA/non-DMA status of the command is correct. * It is not possible to use s->dma directly in the section below as
* It is not possible to use s->dma directly in the section below as * some OSs send non-DMA NOP commands after a DMA transfer. Hence if the
* some OSs send non-DMA NOP commands after a DMA transfer. Hence if the * async data transfer is delayed then s->dma is set incorrectly.
* async data transfer is delayed then s->dma is set incorrectly. */
*/
return;
}
if (s->ti_cmd == (CMD_TI | CMD_DMA)) { if (s->ti_cmd == (CMD_TI | CMD_DMA)) {
if (dmalen) { if (dmalen) {