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Commit 9fa29a67 authored by Gustavo A. R. Silva's avatar Gustavo A. R. Silva
Browse files

scsi: imm: mark expected switch fall-throughs 



In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that, in this particular case, I placed all the "Phase N - ..."
comments on the same line as its corresponding switch case. The same
way in which similar comments appear in drivers/scsi/ppa.c. This makes
it possible to place the "fall through" annotations at the bottom of
each switch case, which is what GCC is expecting to find.

Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
parent 1f771637

drivers/scsi/imm.c

+17 −16
Original line number Diff line number Diff line
@@ -796,21 +796,21 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd) 
			return 0;

		}

		return 1;	/* wait until imm_wakeup claims parport */

		/* Phase 1 - Connected */

	case 1:



	case 1:		/* Phase 1 - Connected */

		imm_connect(dev, CONNECT_EPP_MAYBE);

		cmd->SCp.phase++;

		/* fall through */



		/* Phase 2 - We are now talking to the scsi bus */

	case 2:

	case 2:		/* Phase 2 - We are now talking to the scsi bus */

		if (!imm_select(dev, scmd_id(cmd))) {

			imm_fail(dev, DID_NO_CONNECT);

			return 0;

		}

		cmd->SCp.phase++;

		/* fall through */



		/* Phase 3 - Ready to accept a command */

	case 3:

	case 3:		/* Phase 3 - Ready to accept a command */

		w_ctr(ppb, 0x0c);

		if (!(r_str(ppb) & 0x80))

			return 1;
@@ -818,9 +818,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd) 
		if (!imm_send_command(cmd))

			return 0;

		cmd->SCp.phase++;

		/* fall through */



		/* Phase 4 - Setup scatter/gather buffers */

	case 4:

	case 4:		/* Phase 4 - Setup scatter/gather buffers */

		if (scsi_bufflen(cmd)) {

			cmd->SCp.buffer = scsi_sglist(cmd);

			cmd->SCp.this_residual = cmd->SCp.buffer->length;
@@ -834,8 +834,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd) 
		cmd->SCp.phase++;

		if (cmd->SCp.this_residual & 0x01)

			cmd->SCp.this_residual++;

		/* Phase 5 - Pre-Data transfer stage */

	case 5:

		/* fall through */



	case 5:		/* Phase 5 - Pre-Data transfer stage */

		/* Spin lock for BUSY */

		w_ctr(ppb, 0x0c);

		if (!(r_str(ppb) & 0x80))
@@ -850,9 +851,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd) 
			if (imm_negotiate(dev))

				return 0;

		cmd->SCp.phase++;

		/* fall through */



		/* Phase 6 - Data transfer stage */

	case 6:

	case 6:		/* Phase 6 - Data transfer stage */

		/* Spin lock for BUSY */

		w_ctr(ppb, 0x0c);

		if (!(r_str(ppb) & 0x80))
@@ -866,9 +867,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd) 
				return 1;

		}

		cmd->SCp.phase++;

		/* fall through */



		/* Phase 7 - Post data transfer stage */

	case 7:

	case 7:		/* Phase 7 - Post data transfer stage */

		if ((dev->dp) && (dev->rd)) {

			if ((dev->mode == IMM_NIBBLE) || (dev->mode == IMM_PS2)) {

				w_ctr(ppb, 0x4);
@@ -878,9 +879,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd) 
			}

		}

		cmd->SCp.phase++;

		/* fall through */



		/* Phase 8 - Read status/message */

	case 8:

	case 8:		/* Phase 8 - Read status/message */

		/* Check for data overrun */

		if (imm_wait(dev) != (unsigned char) 0xb8) {

			imm_fail(dev, DID_ERROR);