Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753497AbcDAI3W (ORCPT ); Fri, 1 Apr 2016 04:29:22 -0400 Received: from mail-pf0-f193.google.com ([209.85.192.193]:36601 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751895AbcDAI2y (ORCPT ); Fri, 1 Apr 2016 04:28:54 -0400 Date: Fri, 1 Apr 2016 17:28:22 +0900 From: Daeseok Youn To: lidza.louina@gmail.com Cc: markh@compro.net, gregkh@linuxfoundation.org, driverdev-devel@linuxdriverproject.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH 1/2] staging: dgnc: remove too many traverse pointer Message-ID: <20160401082822.GA17300@SEL-JYOUN-D1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5912 Lines: 181 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 --- 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