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Message-Id: <20200219084118.26491-3-jslaby@suse.cz>
Date: Wed, 19 Feb 2020 09:40:57 +0100
From: Jiri Slaby <jslaby@...e.cz>
To: gregkh@...uxfoundation.org
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 03/24] n_hdlc: convert debuglevel use to pr_debug
With pr_debug we have a fine-grained control about debugging prints. So
convert the use of global debuglevel variable and tests to a commonly
used pr_debug. And drop debuglevel completely.
This also implicitly adds a loglevel to the messages (KERN_DEBUG) as it
was missing on most of them.
And also use __func__ instead of function names explicitly typed.
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
drivers/tty/n_hdlc.c | 79 +++++++++++++++++---------------------------
1 file changed, 31 insertions(+), 48 deletions(-)
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 881da4d440c8..e37dab2528a1 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -160,10 +160,6 @@ static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *list);
static struct n_hdlc *n_hdlc_alloc (void);
-/* debug level can be set by insmod for debugging purposes */
-#define DEBUG_LEVEL_INFO 1
-static int debuglevel;
-
/* max frame size for memory allocations */
static int maxframe = 4096;
@@ -310,11 +306,9 @@ static int n_hdlc_tty_open (struct tty_struct *tty)
{
struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_open() called (device=%s)\n",
- __FILE__,__LINE__,
- tty->name);
-
+ pr_debug("%s(%d)%s() called (device=%s)\n",
+ __FILE__, __LINE__, __func__, tty->name);
+
/* There should not be an existing table for this slot. */
if (n_hdlc) {
printk (KERN_ERR"n_hdlc_tty_open:tty already associated!\n" );
@@ -372,10 +366,9 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
while (tbuf) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)sending frame %p, count=%d\n",
- __FILE__,__LINE__,tbuf,tbuf->count);
-
+ pr_debug("%s(%d)sending frame %p, count=%d\n",
+ __FILE__, __LINE__, tbuf, tbuf->count);
+
/* Send the next block of data to device */
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
actual = tty->ops->write(tty, tbuf->buf, tbuf->count);
@@ -391,10 +384,9 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
actual = tbuf->count;
if (actual == tbuf->count) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)frame %p completed\n",
- __FILE__,__LINE__,tbuf);
-
+ pr_debug("%s(%d)frame %p completed\n",
+ __FILE__, __LINE__, tbuf);
+
/* free current transmit buffer */
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, tbuf);
@@ -404,9 +396,8 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
/* get next pending transmit buffer */
tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
} else {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)frame %p pending\n",
- __FILE__,__LINE__,tbuf);
+ pr_debug("%s(%d)frame %p pending\n",
+ __FILE__, __LINE__, tbuf);
/*
* the buffer was not accepted by driver,
@@ -467,10 +458,9 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
register struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
register struct n_hdlc_buf *buf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_receive() called count=%d\n",
- __FILE__,__LINE__, count);
-
+ pr_debug("%s(%d)%s() called count=%d\n",
+ __FILE__, __LINE__, __func__, count);
+
/* This can happen if stuff comes in on the backup tty */
if (!n_hdlc || tty != n_hdlc->tty)
return;
@@ -483,9 +473,8 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
}
if ( count>maxframe ) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d) rx count>maxframesize, data discarded\n",
- __FILE__,__LINE__);
+ pr_debug("%s(%d) rx count>maxframesize, data discarded\n",
+ __FILE__, __LINE__);
return;
}
@@ -500,9 +489,8 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
}
if (!buf) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d) no more rx buffers, data discarded\n",
- __FILE__,__LINE__);
+ pr_debug("%s(%d) no more rx buffers, data discarded\n",
+ __FILE__, __LINE__);
return;
}
@@ -619,10 +607,9 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
DECLARE_WAITQUEUE(wait, current);
struct n_hdlc_buf *tbuf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_write() called count=%zd\n",
- __FILE__,__LINE__,count);
-
+ pr_debug("%s(%d)%s() called count=%zd\n", __FILE__, __LINE__, __func__,
+ count);
+
/* Verify pointers */
if (!n_hdlc)
return -EIO;
@@ -632,11 +619,8 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
/* verify frame size */
if (count > maxframe ) {
- if (debuglevel & DEBUG_LEVEL_INFO)
- printk (KERN_WARNING
- "n_hdlc_tty_write: truncating user packet "
- "from %lu to %d\n", (unsigned long) count,
- maxframe );
+ pr_debug("%s: truncating user packet from %zu to %d\n",
+ __func__, count, maxframe);
count = maxframe;
}
@@ -704,10 +688,8 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
unsigned long flags;
struct n_hdlc_buf *buf = NULL;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_ioctl() called %d\n",
- __FILE__,__LINE__,cmd);
-
+ pr_debug("%s(%d)%s() called %d\n", __FILE__, __LINE__, __func__, cmd);
+
/* Verify the status of the device */
if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC)
return -EBADF;
@@ -822,8 +804,9 @@ static struct n_hdlc *n_hdlc_alloc(void)
buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
if (buf)
n_hdlc_buf_put(&n_hdlc->rx_free_buf_list,buf);
- else if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_alloc(), kalloc() failed for rx buffer %d\n",__FILE__,__LINE__, i);
+ else
+ pr_debug("%s(%d)%s(), kmalloc() failed for rx buffer %d\n",
+ __FILE__, __LINE__, __func__, i);
}
/* allocate free tx buffer list */
@@ -831,8 +814,9 @@ static struct n_hdlc *n_hdlc_alloc(void)
buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
if (buf)
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list,buf);
- else if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_alloc(), kalloc() failed for tx buffer %d\n",__FILE__,__LINE__, i);
+ else
+ pr_debug("%s(%d)%s(), kmalloc() failed for tx buffer %d\n",
+ __FILE__, __LINE__, __func__, i);
}
/* Initialize the control block */
@@ -960,6 +944,5 @@ module_exit(n_hdlc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Paul Fulghum paulkf@...rogate.com");
-module_param(debuglevel, int, 0);
module_param(maxframe, int, 0);
MODULE_ALIAS_LDISC(N_HDLC);
--
2.25.0
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