[PATCH v4 4/7] can: slcan: change every `slc' occurrence in `slcan'

From: Dario Binacchi
Date: Thu Jul 28 2022 - 03:03:33 EST

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In the driver there are parts of code where the prefix `slc' is used and
others where the prefix `slcan' is used instead. The patch replaces
every occurrence of `slc' with `slcan', except for the netdev functions
where, to avoid compilation conflicts, it was necessary to replace `slc'
with `slcan_netdev'.

The patch does not make any functional changes.

Signed-off-by: Dario Binacchi <dario.binacchi@xxxxxxxxxxxxxxxxxxxx>
---

(no changes since v1)

drivers/net/can/slcan/slcan-core.c | 109 +++++++++++++++--------------
1 file changed, 56 insertions(+), 53 deletions(-)

diff --git a/drivers/net/can/slcan/slcan-core.c b/drivers/net/can/slcan/slcan-core.c
index 0d309d0636df..bd8e84ded051 100644
--- a/drivers/net/can/slcan/slcan-core.c
+++ b/drivers/net/can/slcan/slcan-core.c
@@ -65,16 +65,17 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Oliver Hartkopp <socketcan@xxxxxxxxxxxx>");

/* maximum rx buffer len: extended CAN frame with timestamp */
-#define SLC_MTU (sizeof("T1111222281122334455667788EA5F\r") + 1)
-
-#define SLC_CMD_LEN 1
-#define SLC_SFF_ID_LEN 3
-#define SLC_EFF_ID_LEN 8
-#define SLC_STATE_LEN 1
-#define SLC_STATE_BE_RXCNT_LEN 3
-#define SLC_STATE_BE_TXCNT_LEN 3
-#define SLC_STATE_FRAME_LEN (1 + SLC_CMD_LEN + SLC_STATE_BE_RXCNT_LEN + \
- SLC_STATE_BE_TXCNT_LEN)
+#define SLCAN_MTU (sizeof("T1111222281122334455667788EA5F\r") + 1)
+
+#define SLCAN_CMD_LEN 1
+#define SLCAN_SFF_ID_LEN 3
+#define SLCAN_EFF_ID_LEN 8
+#define SLCAN_STATE_LEN 1
+#define SLCAN_STATE_BE_RXCNT_LEN 3
+#define SLCAN_STATE_BE_TXCNT_LEN 3
+#define SLCAN_STATE_FRAME_LEN (1 + SLCAN_CMD_LEN + \
+ SLCAN_STATE_BE_RXCNT_LEN + \
+ SLCAN_STATE_BE_TXCNT_LEN)
struct slcan {
struct can_priv can;

@@ -85,9 +86,9 @@ struct slcan {
struct work_struct tx_work; /* Flushes transmit buffer */

/* These are pointers to the malloc()ed frame buffers. */
- unsigned char rbuff[SLC_MTU]; /* receiver buffer */
+ unsigned char rbuff[SLCAN_MTU]; /* receiver buffer */
int rcount; /* received chars counter */
- unsigned char xbuff[SLC_MTU]; /* transmitter buffer */
+ unsigned char xbuff[SLCAN_MTU]; /* transmitter buffer*/
unsigned char *xhead; /* pointer to next XMIT byte */
int xleft; /* bytes left in XMIT queue */

@@ -166,7 +167,7 @@ int slcan_enable_err_rst_on_open(struct net_device *ndev, bool on)
*************************************************************************/

/* Send one completely decapsulated can_frame to the network layer */
-static void slc_bump_frame(struct slcan *sl)
+static void slcan_bump_frame(struct slcan *sl)
{
struct sk_buff *skb;
struct can_frame *cf;
@@ -186,10 +187,10 @@ static void slc_bump_frame(struct slcan *sl)
fallthrough;
case 't':
/* store dlc ASCII value and terminate SFF CAN ID string */
- cf->len = sl->rbuff[SLC_CMD_LEN + SLC_SFF_ID_LEN];
- sl->rbuff[SLC_CMD_LEN + SLC_SFF_ID_LEN] = 0;
+ cf->len = sl->rbuff[SLCAN_CMD_LEN + SLCAN_SFF_ID_LEN];
+ sl->rbuff[SLCAN_CMD_LEN + SLCAN_SFF_ID_LEN] = 0;
/* point to payload data behind the dlc */
- cmd += SLC_CMD_LEN + SLC_SFF_ID_LEN + 1;
+ cmd += SLCAN_CMD_LEN + SLCAN_SFF_ID_LEN + 1;
break;
case 'R':
cf->can_id = CAN_RTR_FLAG;
@@ -197,16 +198,16 @@ static void slc_bump_frame(struct slcan *sl)
case 'T':
cf->can_id |= CAN_EFF_FLAG;
/* store dlc ASCII value and terminate EFF CAN ID string */
- cf->len = sl->rbuff[SLC_CMD_LEN + SLC_EFF_ID_LEN];
- sl->rbuff[SLC_CMD_LEN + SLC_EFF_ID_LEN] = 0;
+ cf->len = sl->rbuff[SLCAN_CMD_LEN + SLCAN_EFF_ID_LEN];
+ sl->rbuff[SLCAN_CMD_LEN + SLCAN_EFF_ID_LEN] = 0;
/* point to payload data behind the dlc */
- cmd += SLC_CMD_LEN + SLC_EFF_ID_LEN + 1;
+ cmd += SLCAN_CMD_LEN + SLCAN_EFF_ID_LEN + 1;
break;
default:
goto decode_failed;
}

- if (kstrtou32(sl->rbuff + SLC_CMD_LEN, 16, &tmpid))
+ if (kstrtou32(sl->rbuff + SLCAN_CMD_LEN, 16, &tmpid))
goto decode_failed;

cf->can_id |= tmpid;
@@ -253,7 +254,7 @@ static void slc_bump_frame(struct slcan *sl)
* sb256256 : state bus-off: rx counter 256, tx counter 256
* sa057033 : state active, rx counter 57, tx counter 33
*/
-static void slc_bump_state(struct slcan *sl)
+static void slcan_bump_state(struct slcan *sl)
{
struct net_device *dev = sl->dev;
struct sk_buff *skb;
@@ -279,16 +280,16 @@ static void slc_bump_state(struct slcan *sl)
return;
}

- if (state == sl->can.state || sl->rcount < SLC_STATE_FRAME_LEN)
+ if (state == sl->can.state || sl->rcount < SLCAN_STATE_FRAME_LEN)
return;

- cmd += SLC_STATE_BE_RXCNT_LEN + SLC_CMD_LEN + 1;
- cmd[SLC_STATE_BE_TXCNT_LEN] = 0;
+ cmd += SLCAN_STATE_BE_RXCNT_LEN + SLCAN_CMD_LEN + 1;
+ cmd[SLCAN_STATE_BE_TXCNT_LEN] = 0;
if (kstrtou32(cmd, 10, &txerr))
return;

*cmd = 0;
- cmd -= SLC_STATE_BE_RXCNT_LEN;
+ cmd -= SLCAN_STATE_BE_RXCNT_LEN;
if (kstrtou32(cmd, 10, &rxerr))
return;

@@ -316,7 +317,7 @@ static void slc_bump_state(struct slcan *sl)
* e1a : len 1, errors: ACK error
* e3bcO: len 3, errors: Bit0 error, CRC error, Tx overrun error
*/
-static void slc_bump_err(struct slcan *sl)
+static void slcan_bump_err(struct slcan *sl)
{
struct net_device *dev = sl->dev;
struct sk_buff *skb;
@@ -332,7 +333,7 @@ static void slc_bump_err(struct slcan *sl)
else
return;

- if ((len + SLC_CMD_LEN + 1) > sl->rcount)
+ if ((len + SLCAN_CMD_LEN + 1) > sl->rcount)
return;

skb = alloc_can_err_skb(dev, &cf);
@@ -340,7 +341,7 @@ static void slc_bump_err(struct slcan *sl)
if (skb)
cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;

- cmd += SLC_CMD_LEN + 1;
+ cmd += SLCAN_CMD_LEN + 1;
for (i = 0; i < len; i++, cmd++) {
switch (*cmd) {
case 'a':
@@ -429,7 +430,7 @@ static void slc_bump_err(struct slcan *sl)
netif_rx(skb);
}

-static void slc_bump(struct slcan *sl)
+static void slcan_bump(struct slcan *sl)
{
switch (sl->rbuff[0]) {
case 'r':
@@ -439,11 +440,11 @@ static void slc_bump(struct slcan *sl)
case 'R':
fallthrough;
case 'T':
- return slc_bump_frame(sl);
+ return slcan_bump_frame(sl);
case 'e':
- return slc_bump_err(sl);
+ return slcan_bump_err(sl);
case 's':
- return slc_bump_state(sl);
+ return slcan_bump_state(sl);
default:
return;
}
@@ -455,12 +456,12 @@ static void slcan_unesc(struct slcan *sl, unsigned char s)
if ((s == '\r') || (s == '\a')) { /* CR or BEL ends the pdu */
if (!test_and_clear_bit(SLF_ERROR, &sl->flags) &&
sl->rcount > 4)
- slc_bump(sl);
+ slcan_bump(sl);

sl->rcount = 0;
} else {
if (!test_bit(SLF_ERROR, &sl->flags)) {
- if (sl->rcount < SLC_MTU) {
+ if (sl->rcount < SLCAN_MTU) {
sl->rbuff[sl->rcount++] = s;
return;
}
@@ -476,7 +477,7 @@ static void slcan_unesc(struct slcan *sl, unsigned char s)
*************************************************************************/

/* Encapsulate one can_frame and stuff into a TTY queue. */
-static void slc_encaps(struct slcan *sl, struct can_frame *cf)
+static void slcan_encaps(struct slcan *sl, struct can_frame *cf)
{
int actual, i;
unsigned char *pos;
@@ -493,11 +494,11 @@ static void slc_encaps(struct slcan *sl, struct can_frame *cf)
/* determine number of chars for the CAN-identifier */
if (cf->can_id & CAN_EFF_FLAG) {
id &= CAN_EFF_MASK;
- endpos = pos + SLC_EFF_ID_LEN;
+ endpos = pos + SLCAN_EFF_ID_LEN;
} else {
*pos |= 0x20; /* convert R/T to lower case for SFF */
id &= CAN_SFF_MASK;
- endpos = pos + SLC_SFF_ID_LEN;
+ endpos = pos + SLCAN_SFF_ID_LEN;
}

/* build 3 (SFF) or 8 (EFF) digit CAN identifier */
@@ -507,7 +508,8 @@ static void slc_encaps(struct slcan *sl, struct can_frame *cf)
id >>= 4;
}

- pos += (cf->can_id & CAN_EFF_FLAG) ? SLC_EFF_ID_LEN : SLC_SFF_ID_LEN;
+ pos += (cf->can_id & CAN_EFF_FLAG) ?
+ SLCAN_EFF_ID_LEN : SLCAN_SFF_ID_LEN;

*pos++ = cf->len + '0';

@@ -585,7 +587,8 @@ static void slcan_write_wakeup(struct tty_struct *tty)
}

/* Send a can_frame to a TTY queue. */
-static netdev_tx_t slc_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t slcan_netdev_xmit(struct sk_buff *skb,
+ struct net_device *dev)
{
struct slcan *sl = netdev_priv(dev);

@@ -604,7 +607,7 @@ static netdev_tx_t slc_xmit(struct sk_buff *skb, struct net_device *dev)
}

netif_stop_queue(sl->dev);
- slc_encaps(sl, (struct can_frame *)skb->data); /* encaps & send */
+ slcan_encaps(sl, (struct can_frame *)skb->data); /* encaps & send */
spin_unlock(&sl->lock);

out:
@@ -647,7 +650,7 @@ static int slcan_transmit_cmd(struct slcan *sl, const unsigned char *cmd)
}

/* Netdevice UP -> DOWN routine */
-static int slc_close(struct net_device *dev)
+static int slcan_netdev_close(struct net_device *dev)
{
struct slcan *sl = netdev_priv(dev);
int err;
@@ -676,10 +679,10 @@ static int slc_close(struct net_device *dev)
}

/* Netdevice DOWN -> UP routine */
-static int slc_open(struct net_device *dev)
+static int slcan_netdev_open(struct net_device *dev)
{
struct slcan *sl = netdev_priv(dev);
- unsigned char cmd[SLC_MTU];
+ unsigned char cmd[SLCAN_MTU];
int err, s;

/* The baud rate is not set with the command
@@ -739,16 +742,16 @@ static int slc_open(struct net_device *dev)
return err;
}

-static int slcan_change_mtu(struct net_device *dev, int new_mtu)
+static int slcan_netdev_change_mtu(struct net_device *dev, int new_mtu)
{
return -EINVAL;
}

-static const struct net_device_ops slc_netdev_ops = {
- .ndo_open = slc_open,
- .ndo_stop = slc_close,
- .ndo_start_xmit = slc_xmit,
- .ndo_change_mtu = slcan_change_mtu,
+static const struct net_device_ops slcan_netdev_ops = {
+ .ndo_open = slcan_netdev_open,
+ .ndo_stop = slcan_netdev_close,
+ .ndo_start_xmit = slcan_netdev_xmit,
+ .ndo_change_mtu = slcan_netdev_change_mtu,
};

/******************************************
@@ -821,7 +824,7 @@ static int slcan_open(struct tty_struct *tty)

/* Configure netdev interface */
sl->dev = dev;
- dev->netdev_ops = &slc_netdev_ops;
+ dev->netdev_ops = &slcan_netdev_ops;
slcan_set_ethtool_ops(dev);

/* Mark ldisc channel as alive */
@@ -889,7 +892,7 @@ static int slcan_ioctl(struct tty_struct *tty, unsigned int cmd,
}
}

-static struct tty_ldisc_ops slc_ldisc = {
+static struct tty_ldisc_ops slcan_ldisc = {
.owner = THIS_MODULE,
.num = N_SLCAN,
.name = KBUILD_MODNAME,
@@ -907,7 +910,7 @@ static int __init slcan_init(void)
pr_info("serial line CAN interface driver\n");

/* Fill in our line protocol discipline, and register it */
- status = tty_register_ldisc(&slc_ldisc);
+ status = tty_register_ldisc(&slcan_ldisc);
if (status)
pr_err("can't register line discipline\n");

@@ -919,7 +922,7 @@ static void __exit slcan_exit(void)
/* This will only be called when all channels have been closed by
* userspace - tty_ldisc.c takes care of the module's refcount.
*/
- tty_unregister_ldisc(&slc_ldisc);
+ tty_unregister_ldisc(&slcan_ldisc);
}

module_init(slcan_init);
--
2.32.0

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