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Message-ID: <20160401082822.GA17300@SEL-JYOUN-D1>
Date: Fri, 1 Apr 2016 17:28:22 +0900
From: Daeseok Youn <daeseok.youn@...il.com>
To: lidza.louina@...il.com
Cc: markh@...pro.net, gregkh@...uxfoundation.org,
driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 1/2] staging: dgnc: remove too many traverse pointer
The "ch->ch_bd" is already assined to "bd" but this is only
for checking null or MAGIC number.
in the dgnc_tty_ioctl function, bd can be used for referencing
to board_ops structure.
Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
---
drivers/staging/dgnc/dgnc_tty.c | 37 ++++++++++++++++++++-----------------
1 file changed, 20 insertions(+), 17 deletions(-)
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index d617fca..5d8da41 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -2518,6 +2518,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg)
{
struct dgnc_board *bd;
+ struct board_ops *ch_bd_ops;
struct channel_t *ch;
struct un_t *un;
int rc;
@@ -2539,6 +2540,8 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if (!bd || bd->magic != DGNC_BOARD_MAGIC)
return -ENODEV;
+ ch_bd_ops = bd->bd_ops;
+
spin_lock_irqsave(&ch->ch_lock, flags);
if (un->un_open_count <= 0) {
@@ -2563,7 +2566,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if (rc)
return rc;
- rc = ch->ch_bd->bd_ops->drain(tty, 0);
+ rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
@@ -2571,7 +2574,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
spin_lock_irqsave(&ch->ch_lock, flags);
if (((cmd == TCSBRK) && (!arg)) || (cmd == TCSBRKP))
- ch->ch_bd->bd_ops->send_break(ch, 250);
+ ch_bd_ops->send_break(ch, 250);
spin_unlock_irqrestore(&ch->ch_lock, flags);
@@ -2588,13 +2591,13 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if (rc)
return rc;
- rc = ch->ch_bd->bd_ops->drain(tty, 0);
+ rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
spin_lock_irqsave(&ch->ch_lock, flags);
- ch->ch_bd->bd_ops->send_break(ch, 250);
+ ch_bd_ops->send_break(ch, 250);
spin_unlock_irqrestore(&ch->ch_lock, flags);
@@ -2606,13 +2609,13 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if (rc)
return rc;
- rc = ch->ch_bd->bd_ops->drain(tty, 0);
+ rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
spin_lock_irqsave(&ch->ch_lock, flags);
- ch->ch_bd->bd_ops->send_break(ch, 250);
+ ch_bd_ops->send_break(ch, 250);
spin_unlock_irqrestore(&ch->ch_lock, flags);
@@ -2641,7 +2644,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
spin_lock_irqsave(&ch->ch_lock, flags);
tty->termios.c_cflag = ((tty->termios.c_cflag & ~CLOCAL) |
(arg ? CLOCAL : 0));
- ch->ch_bd->bd_ops->param(tty);
+ ch_bd_ops->param(tty);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
@@ -2678,7 +2681,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if ((arg == TCIFLUSH) || (arg == TCIOFLUSH)) {
ch->ch_r_head = ch->ch_r_tail;
- ch->ch_bd->bd_ops->flush_uart_read(ch);
+ ch_bd_ops->flush_uart_read(ch);
/* Force queue flow control to be released, if needed */
dgnc_check_queue_flow_control(ch);
}
@@ -2686,7 +2689,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if ((arg == TCOFLUSH) || (arg == TCIOFLUSH)) {
if (!(un->un_type == DGNC_PRINT)) {
ch->ch_w_head = ch->ch_w_tail;
- ch->ch_bd->bd_ops->flush_uart_write(ch);
+ ch_bd_ops->flush_uart_write(ch);
if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) {
ch->ch_tun.un_flags &=
@@ -2720,14 +2723,14 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
/* flush rx */
ch->ch_flags &= ~CH_STOP;
ch->ch_r_head = ch->ch_r_tail;
- ch->ch_bd->bd_ops->flush_uart_read(ch);
+ ch_bd_ops->flush_uart_read(ch);
/* Force queue flow control to be released, if needed */
dgnc_check_queue_flow_control(ch);
}
/* now wait for all the output to drain */
spin_unlock_irqrestore(&ch->ch_lock, flags);
- rc = ch->ch_bd->bd_ops->drain(tty, 0);
+ rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
@@ -2737,7 +2740,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
case TCSETAW:
spin_unlock_irqrestore(&ch->ch_lock, flags);
- rc = ch->ch_bd->bd_ops->drain(tty, 0);
+ rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
@@ -2760,7 +2763,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
/* set information for ditty */
if (cmd == (DIGI_SETAW)) {
spin_unlock_irqrestore(&ch->ch_lock, flags);
- rc = ch->ch_bd->bd_ops->drain(tty, 0);
+ rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
@@ -2793,7 +2796,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
else
ch->ch_flags &= ~(CH_LOOPBACK);
- ch->ch_bd->bd_ops->param(tty);
+ ch_bd_ops->param(tty);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
}
@@ -2813,7 +2816,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
return rc;
spin_lock_irqsave(&ch->ch_lock, flags);
dgnc_set_custom_speed(ch, new_rate);
- ch->ch_bd->bd_ops->param(tty);
+ ch_bd_ops->param(tty);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
}
@@ -2834,7 +2837,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
if (rc)
return rc;
spin_lock_irqsave(&ch->ch_lock, flags);
- ch->ch_bd->bd_ops->send_immediate_char(ch, c);
+ ch_bd_ops->send_immediate_char(ch, c);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
}
@@ -2922,7 +2925,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
/*
* Is the UART empty? Add that value to whats in our TX queue.
*/
- count = buf.txbuf + ch->ch_bd->bd_ops->get_uart_bytes_left(ch);
+ count = buf.txbuf + ch_bd_ops->get_uart_bytes_left(ch);
/*
* Figure out how much data the RealPort Server believes should
--
1.9.1
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