add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/scsi/imm.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* imm.c   --  low level driver for the IOMEGA MatchMaker
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  * parallel port SCSI host adapter.
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  * 
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@@ -686,7 +687,7 @@
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 		if (cmd->SCp.buffer && !cmd->SCp.this_residual) {
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 			/* if scatter/gather, advance to the next segment */
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 			if (cmd->SCp.buffers_residual--) {
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-				cmd->SCp.buffer++;
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+				cmd->SCp.buffer = sg_next(cmd->SCp.buffer);
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 				cmd->SCp.this_residual =
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 				    cmd->SCp.buffer->length;
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 				cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
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@@ -796,21 +797,21 @@
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 			return 0;
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 		}
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 		return 1;	/* wait until imm_wakeup claims parport */
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-		/* Phase 1 - Connected */
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-	case 1:
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+
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+	case 1:		/* Phase 1 - Connected */
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 		imm_connect(dev, CONNECT_EPP_MAYBE);
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 		cmd->SCp.phase++;
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+		fallthrough;
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-		/* Phase 2 - We are now talking to the scsi bus */
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-	case 2:
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+	case 2:		/* Phase 2 - We are now talking to the scsi bus */
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 		if (!imm_select(dev, scmd_id(cmd))) {
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 			imm_fail(dev, DID_NO_CONNECT);
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 			return 0;
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 		}
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 		cmd->SCp.phase++;
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+		fallthrough;
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-		/* Phase 3 - Ready to accept a command */
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-	case 3:
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+	case 3:		/* Phase 3 - Ready to accept a command */
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 		w_ctr(ppb, 0x0c);
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 		if (!(r_str(ppb) & 0x80))
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 			return 1;
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@@ -818,9 +819,9 @@
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 		if (!imm_send_command(cmd))
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 			return 0;
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 		cmd->SCp.phase++;
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+		fallthrough;
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-		/* Phase 4 - Setup scatter/gather buffers */
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-	case 4:
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+	case 4:		/* Phase 4 - Setup scatter/gather buffers */
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 		if (scsi_bufflen(cmd)) {
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 			cmd->SCp.buffer = scsi_sglist(cmd);
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 			cmd->SCp.this_residual = cmd->SCp.buffer->length;
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@@ -834,8 +835,9 @@
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 		cmd->SCp.phase++;
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 		if (cmd->SCp.this_residual & 0x01)
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 			cmd->SCp.this_residual++;
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-		/* Phase 5 - Pre-Data transfer stage */
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-	case 5:
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+		fallthrough;
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+
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+	case 5:		/* Phase 5 - Pre-Data transfer stage */
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 		/* Spin lock for BUSY */
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 		w_ctr(ppb, 0x0c);
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 		if (!(r_str(ppb) & 0x80))
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@@ -850,9 +852,9 @@
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 			if (imm_negotiate(dev))
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 				return 0;
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 		cmd->SCp.phase++;
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+		fallthrough;
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-		/* Phase 6 - Data transfer stage */
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-	case 6:
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+	case 6:		/* Phase 6 - Data transfer stage */
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 		/* Spin lock for BUSY */
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 		w_ctr(ppb, 0x0c);
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 		if (!(r_str(ppb) & 0x80))
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@@ -866,9 +868,9 @@
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 				return 1;
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 		}
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 		cmd->SCp.phase++;
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+		fallthrough;
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-		/* Phase 7 - Post data transfer stage */
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-	case 7:
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+	case 7:		/* Phase 7 - Post data transfer stage */
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 		if ((dev->dp) && (dev->rd)) {
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 			if ((dev->mode == IMM_NIBBLE) || (dev->mode == IMM_PS2)) {
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 				w_ctr(ppb, 0x4);
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@@ -878,9 +880,9 @@
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 			}
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 		}
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 		cmd->SCp.phase++;
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+		fallthrough;
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-		/* Phase 8 - Read status/message */
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-	case 8:
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+	case 8:		/* Phase 8 - Read status/message */
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 		/* Check for data overrun */
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 		if (imm_wait(dev) != (unsigned char) 0xb8) {
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 			imm_fail(dev, DID_ERROR);
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@@ -901,7 +903,6 @@
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 			w_ctr(ppb, 0x4);
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 		}
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 		return 0;	/* Finished */
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-		break;
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 	default:
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 		printk("imm: Invalid scsi phase\n");
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@@ -967,10 +968,8 @@
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 	case 1:		/* Have not connected to interface */
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 		dev->cur_cmd = NULL;	/* Forget the problem */
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 		return SUCCESS;
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-		break;
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 	default:		/* SCSI command sent, can not abort */
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 		return FAILED;
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-		break;
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 	}
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 }
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@@ -1110,7 +1109,6 @@
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 	.bios_param		= imm_biosparam,
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 	.this_id		= 7,
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 	.sg_tablesize		= SG_ALL,
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-	.use_clustering		= ENABLE_CLUSTERING,
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 	.can_queue		= 1,
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 	.slave_alloc		= imm_adjust_queue,
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 };