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Subject[PATCH 16/41] 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.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
drivers/scsi/imm.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/imm.c b/drivers/scsi/imm.c
index 8c6627bc8a39..629e0bc70d3e 100644
--- a/drivers/scsi/imm.c
+++ b/drivers/scsi/imm.c
@@ -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);
--
2.17.1
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