dgnc_tty_preinit() and dgnc_tty_post_uninit() functions are used to
allocate and free "dgnc_TmpWriteBuf" and this "dgnc_TmpWriteBuf" is
not really getting used. Hence remove these redundant functions.
Also remove dgnc_TmpWriteBuf variable as it is not used anymore.
Signed-off-by: Pankaj Bharadiya <pankaj.bharadiya@xxxxxxxxx>
---
drivers/staging/dgnc/dgnc_driver.c | 13 -----------
drivers/staging/dgnc/dgnc_tty.c | 45 ++------------------------------------
drivers/staging/dgnc/dgnc_tty.h | 2 --
3 files changed, 2 insertions(+), 58 deletions(-)
diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c
index fd372d3..0fe7e85 100644
--- a/drivers/staging/dgnc/dgnc_driver.c
+++ b/drivers/staging/dgnc/dgnc_driver.c
@@ -151,7 +151,6 @@ static void cleanup(bool sysfiles)
dgnc_cleanup_board(dgnc_board[i]);
}
- dgnc_tty_post_uninit();
}
/*
@@ -241,16 +240,6 @@ static int dgnc_start(void)
goto failed_device;
}
- /*
- * Init any global tty stuff.
- */
- rc = dgnc_tty_preinit();
-
- if (rc < 0) {
- pr_err(DRVSTR ": tty preinit - not enough memory (%d)\n", rc);
- goto failed_tty;
- }
-
/* Start the poller */
spin_lock_irqsave(&dgnc_poll_lock, flags);
setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0);
@@ -262,8 +251,6 @@ static int dgnc_start(void)
return 0;
-failed_tty:
- device_destroy(dgnc_class, MKDEV(dgnc_major, 0));
failed_device:
class_destroy(dgnc_class);
failed_class:
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index ef9a45b..8d557fa 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -43,11 +43,6 @@
#include "dgnc_utils.h"
/*
- * internal variables
- */
-static unsigned char *dgnc_TmpWriteBuf;
-
-/*
* Default transparent print information.
*/
static struct digi_t dgnc_digi_init = {
@@ -144,31 +139,6 @@ static void dgnc_tty_set_termios(struct tty_struct *tty,
************************************************************************/
/*
- * dgnc_tty_preinit()
- *
- * Initialize any global tty related data before we download any boards.
- */
-int dgnc_tty_preinit(void)
-{
- /*
- * Allocate a buffer for doing the copy from user space to
- * kernel space in dgnc_write(). We only use one buffer and
- * control access to it with a semaphore. If we are paging, we
- * are already in trouble so one buffer won't hurt much anyway.
- *
- * We are okay to sleep in the malloc, as this routine
- * is only called during module load, (not in interrupt context),
- * and with no locks held.
- */
- dgnc_TmpWriteBuf = kmalloc(WRITEBUFLEN, GFP_KERNEL);
-
- if (!dgnc_TmpWriteBuf)
- return -ENOMEM;
-
- return 0;
-}
-
-/*
* dgnc_tty_register()
*
* Init the tty subsystem for this board.
@@ -365,17 +335,6 @@ int dgnc_tty_init(struct dgnc_board *brd)
}
/*
- * dgnc_tty_post_uninit()
- *
- * UnInitialize any global tty related data.
- */
-void dgnc_tty_post_uninit(void)
-{
- kfree(dgnc_TmpWriteBuf);
- dgnc_TmpWriteBuf = NULL;
-}
-
-/*
* dgnc_cleanup_tty()
*
* Uninitialize the TTY portion of this driver. Free all memory and
@@ -1543,7 +1502,7 @@ static int dgnc_tty_write_room(struct tty_struct *tty)
int ret = 0;
unsigned long flags;
- if (!tty || !dgnc_TmpWriteBuf)
+ if (!tty)
return 0;
un = tty->driver_data;
@@ -1623,7 +1582,7 @@ static int dgnc_tty_write(struct tty_struct *tty,
ushort tmask;
uint remain;
- if (!tty || !dgnc_TmpWriteBuf)
+ if (!tty)
return 0;
un = tty->driver_data;
diff --git a/drivers/staging/dgnc/dgnc_tty.h b/drivers/staging/dgnc/dgnc_tty.h
index 24c9a41..85a1310 100644
--- a/drivers/staging/dgnc/dgnc_tty.h
+++ b/drivers/staging/dgnc/dgnc_tty.h
@@ -21,10 +21,8 @@
int dgnc_tty_register(struct dgnc_board *brd);
void dgnc_tty_unregister(struct dgnc_board *brd);
-int dgnc_tty_preinit(void);
int dgnc_tty_init(struct dgnc_board *);
-void dgnc_tty_post_uninit(void);
void dgnc_cleanup_tty(struct dgnc_board *);
void dgnc_input(struct channel_t *ch);
--
1.9.1
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