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Message-Id: <1494851450-29629-1-git-send-email-haimdaniel@gmail.com>
Date: Mon, 15 May 2017 15:30:50 +0300
From: Haim Daniel <haimdaniel@...il.com>
To: lidza.louina@...il.com, markh@...pro.net,
gregkh@...uxfoundation.org, driverdev-devel@...uxdriverproject.org,
devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
dan.carpenter@...cle.com
Cc: Haim Daniel <haimdaniel@...il.com>
Subject: [PATCH v3] drivers/staging: refactor dgnc tty registration.
-remove duplicate tty allocation code for serial and printer drivers.
-fix sparse warning: too long initializer-string for array of char.
Signed-off-by: Haim Daniel <haimdaniel@...il.com>
---
drivers/staging/dgnc/dgnc_driver.h | 13 ----
drivers/staging/dgnc/dgnc_tty.c | 150 +++++++++++++++----------------------
2 files changed, 59 insertions(+), 104 deletions(-)
diff --git a/drivers/staging/dgnc/dgnc_driver.h b/drivers/staging/dgnc/dgnc_driver.h
index 980410f..764d6fe 100644
--- a/drivers/staging/dgnc/dgnc_driver.h
+++ b/drivers/staging/dgnc/dgnc_driver.h
@@ -52,19 +52,6 @@
#define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000)
-/*
- * Define a local default termios struct. All ports will be created
- * with this termios initially. This is the same structure that is defined
- * as the default in tty_io.c with the same settings overridden as in serial.c
- *
- * In short, this should match the internal serial ports' defaults.
- */
-#define DEFAULT_IFLAGS (ICRNL | IXON)
-#define DEFAULT_OFLAGS (OPOST | ONLCR)
-#define DEFAULT_CFLAGS (B9600 | CS8 | CREAD | HUPCL | CLOCAL)
-#define DEFAULT_LFLAGS (ISIG | ICANON | ECHO | ECHOE | ECHOK | \
- ECHOCTL | ECHOKE | IEXTEN)
-
#ifndef _POSIX_VDISABLE
#define _POSIX_VDISABLE '\0'
#endif
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index 9e98781..d3736da 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -51,22 +51,6 @@
.digi_term = "ansi" /* default terminal type */
};
-/*
- * Define a local default termios struct. All ports will be created
- * with this termios initially.
- *
- * This defines a raw port at 9600 baud, 8 data bits, no parity,
- * 1 stop bit.
- */
-static const struct ktermios default_termios = {
- .c_iflag = (DEFAULT_IFLAGS),
- .c_oflag = (DEFAULT_OFLAGS),
- .c_cflag = (DEFAULT_CFLAGS),
- .c_lflag = (DEFAULT_LFLAGS),
- .c_cc = INIT_C_CC,
- .c_line = 0,
-};
-
static int dgnc_tty_open(struct tty_struct *tty, struct file *file);
static void dgnc_tty_close(struct tty_struct *tty, struct file *file);
static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file,
@@ -129,6 +113,49 @@ static void dgnc_tty_set_termios(struct tty_struct *tty,
/* TTY Initialization/Cleanup Functions */
+static struct tty_driver *dgnc_tty_create(char *serial_name, uint maxports,
+ int major, int minor)
+{
+ int rc;
+ struct tty_driver *drv;
+
+ drv = tty_alloc_driver(maxports,
+ TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV |
+ TTY_DRIVER_HARDWARE_BREAK);
+ if (IS_ERR(drv))
+ return drv;
+
+ drv->name = serial_name;
+ drv->name_base = 0;
+ drv->major = major;
+ drv->minor_start = minor;
+ drv->type = TTY_DRIVER_TYPE_SERIAL;
+ drv->subtype = SERIAL_TYPE_NORMAL;
+ drv->init_termios = tty_std_termios;
+ drv->init_termios.c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL);
+ drv->init_termios.c_ispeed = 9600;
+ drv->init_termios.c_ospeed = 9600;
+ drv->driver_name = DRVSTR;
+ /*
+ * Entry points for driver. Called by the kernel from
+ * tty_io.c and n_tty.c.
+ */
+ tty_set_operations(drv, &dgnc_tty_ops);
+ rc = tty_register_driver(drv);
+ if (rc < 0) {
+ put_tty_driver(drv);
+ return ERR_PTR(rc);
+ }
+ return drv;
+}
+
+static void dgnc_tty_free(struct tty_driver *drv)
+{
+ tty_unregister_driver(drv);
+ put_tty_driver(drv);
+}
+
/**
* dgnc_tty_register() - Init the tty subsystem for this board.
*/
@@ -136,95 +163,36 @@ int dgnc_tty_register(struct dgnc_board *brd)
{
int rc;
- brd->serial_driver = tty_alloc_driver(brd->maxports,
- TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV |
- TTY_DRIVER_HARDWARE_BREAK);
- if (IS_ERR(brd->serial_driver))
- return PTR_ERR(brd->serial_driver);
-
snprintf(brd->serial_name, MAXTTYNAMELEN, "tty_dgnc_%d_",
brd->boardnum);
- brd->serial_driver->name = brd->serial_name;
- brd->serial_driver->name_base = 0;
- brd->serial_driver->major = 0;
- brd->serial_driver->minor_start = 0;
- brd->serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- brd->serial_driver->subtype = SERIAL_TYPE_NORMAL;
- brd->serial_driver->init_termios = default_termios;
- brd->serial_driver->driver_name = DRVSTR;
-
- /*
- * Entry points for driver. Called by the kernel from
- * tty_io.c and n_tty.c.
- */
- tty_set_operations(brd->serial_driver, &dgnc_tty_ops);
-
- rc = tty_register_driver(brd->serial_driver);
- if (rc < 0) {
- dev_dbg(&brd->pdev->dev,
- "Can't register tty device (%d)\n", rc);
- goto free_serial_driver;
+ brd->serial_driver = dgnc_tty_create(brd->serial_name,
+ brd->maxports, 0, 0);
+ if (IS_ERR(brd->serial_driver)) {
+ rc = PTR_ERR(brd->serial_driver);
+ dev_dbg(&brd->pdev->dev, "Can't register tty device (%d)\n",
+ rc);
+ return rc;
}
- /*
- * If we're doing transparent print, we have to do all of the above
- * again, separately so we don't get the LD confused about what major
- * we are when we get into the dgnc_tty_open() routine.
- */
- brd->print_driver = tty_alloc_driver(brd->maxports,
- TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV |
- TTY_DRIVER_HARDWARE_BREAK);
+ snprintf(brd->print_name, MAXTTYNAMELEN, "pr_dgnc_%d_", brd->boardnum);
+ brd->print_driver = dgnc_tty_create(brd->print_name, brd->maxports,
+ 0x80,
+ brd->serial_driver->major);
if (IS_ERR(brd->print_driver)) {
rc = PTR_ERR(brd->print_driver);
- goto unregister_serial_driver;
- }
-
- snprintf(brd->print_name, MAXTTYNAMELEN, "pr_dgnc_%d_", brd->boardnum);
-
- brd->print_driver->name = brd->print_name;
- brd->print_driver->name_base = 0;
- brd->print_driver->major = brd->serial_driver->major;
- brd->print_driver->minor_start = 0x80;
- brd->print_driver->type = TTY_DRIVER_TYPE_SERIAL;
- brd->print_driver->subtype = SERIAL_TYPE_NORMAL;
- brd->print_driver->init_termios = default_termios;
- brd->print_driver->driver_name = DRVSTR;
-
- /*
- * Entry points for driver. Called by the kernel from
- * tty_io.c and n_tty.c.
- */
- tty_set_operations(brd->print_driver, &dgnc_tty_ops);
-
- rc = tty_register_driver(brd->print_driver);
- if (rc < 0) {
dev_dbg(&brd->pdev->dev,
- "Can't register Transparent Print device(%d)\n",
- rc);
- goto free_print_driver;
+ "Can't register Transparent Print device(%d)\n", rc);
+ dgnc_tty_free(brd->serial_driver);
+ return rc;
}
-
return 0;
-
-free_print_driver:
- put_tty_driver(brd->print_driver);
-unregister_serial_driver:
- tty_unregister_driver(brd->serial_driver);
-free_serial_driver:
- put_tty_driver(brd->serial_driver);
-
- return rc;
}
void dgnc_tty_unregister(struct dgnc_board *brd)
{
- tty_unregister_driver(brd->print_driver);
- tty_unregister_driver(brd->serial_driver);
- put_tty_driver(brd->print_driver);
- put_tty_driver(brd->serial_driver);
+ dgnc_tty_free(brd->print_driver);
+ dgnc_tty_free(brd->serial_driver);
}
/**
--
1.9.1
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