Commit 546a4d18 authored Jan 15, 2017 by Finn Thain Committed by Martin K. Petersen Jan 31, 2017

scsi: atari_scsi: Reset DMA during bus reset only under ST-DMA lock



The atari_scsi driver should not access Falcon DMA chip registers unless
it has acquired exclusive access to that chip. If the driver doesn't
have exclusive access then there's no need for a DMA reset as there are
no scsi commands in progress.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

parent b15e791d

drivers/scsi/atari_scsi.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -682,6 +682,7 @@ static int atari_scsi_bus_reset(struct scsi_cmnd *cmd)
		if (IS_A_TT()) {
		tt_scsi_dma.dma_ctrl = 0;
		} else {
		if (stdma_is_locked_by(scsi_falcon_intr))
		st_dma.dma_mode_status = 0x90;
		atari_dma_active = 0;
		atari_dma_orig_addr = NULL;