From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
Jiri Slaby <jslaby@suse.cz>
Subject: [PATCH 06/19] mxser: remove pointless xmit_buf checks
Date: Thu, 18 Nov 2021 08:31:12 +0100 [thread overview]
Message-ID: <20211118073125.12283-7-jslaby@suse.cz> (raw)
In-Reply-To: <20211118073125.12283-1-jslaby@suse.cz>
xmit_buf is supposed to exist in all these functions. I.e. from
tty_port_operations::activate() to ::shutdown(). So remove these checks.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/tty/mxser.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index eb5fb4fb2aef..6e5e1c74bf3e 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -929,9 +929,6 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou
struct mxser_port *info = tty->driver_data;
unsigned long flags;
- if (!info->port.xmit_buf)
- return 0;
-
while (1) {
c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
SERIAL_XMIT_SIZE - info->xmit_head));
@@ -962,9 +959,6 @@ static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
struct mxser_port *info = tty->driver_data;
unsigned long flags;
- if (!info->port.xmit_buf)
- return 0;
-
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
return 0;
@@ -982,7 +976,7 @@ static void mxser_flush_chars(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- if (!info->xmit_cnt || tty->flow.stopped || !info->port.xmit_buf ||
+ if (!info->xmit_cnt || tty->flow.stopped ||
(tty->hw_stopped && !mxser_16550A_or_MUST(info)))
return;
@@ -1397,7 +1391,7 @@ static void mxser_start(struct tty_struct *tty)
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
- if (info->xmit_cnt && info->port.xmit_buf)
+ if (info->xmit_cnt)
__mxser_start_tx(info);
spin_unlock_irqrestore(&info->slock, flags);
}
@@ -1631,9 +1625,6 @@ static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port
return;
}
- if (port->port.xmit_buf == NULL)
- return;
-
if (!port->xmit_cnt || tty->flow.stopped ||
(tty->hw_stopped && !mxser_16550A_or_MUST(port))) {
__mxser_stop_tx(port);
--
2.33.1
next prev parent reply other threads:[~2021-11-18 7:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-18 7:31 [PATCH 00/19] mxser: another round of cleanups and fixes Jiri Slaby
2021-11-18 7:31 ` [PATCH 01/19] mxser: remove wait for sent from mxser_close_port Jiri Slaby
2021-11-18 7:31 ` [PATCH 02/19] mxser: rename mxser_close_port() to mxser_stop_rx() Jiri Slaby
2021-11-18 7:31 ` [PATCH 03/19] mxser: keep only !tty test in ISR Jiri Slaby
2021-11-18 7:31 ` [PATCH 04/19] mxser: move MSR read to mxser_check_modem_status() Jiri Slaby
2021-11-18 7:31 ` [PATCH 05/19] mxser: clean up tx handling in mxser_transmit_chars() Jiri Slaby
2021-11-18 7:31 ` Jiri Slaby [this message]
2021-11-18 7:31 ` [PATCH 07/19] mxser: remove tty->driver_data NULL check Jiri Slaby
2021-11-18 7:31 ` [PATCH 08/19] mxser: call stop_rx from mxser_shutdown_port() Jiri Slaby
2021-11-18 7:31 ` [PATCH 09/19] mxser: don't flush buffer from mxser_close() directly Jiri Slaby
2021-11-18 7:31 ` [PATCH 10/19] mxser: use tty_port_close() in mxser_close() Jiri Slaby
2021-11-18 7:31 ` [PATCH 11/19] mxser: extract TX empty check from mxser_wait_until_sent() Jiri Slaby
2021-11-18 7:31 ` [PATCH 12/19] mxser: use msleep_interruptible() in mxser_wait_until_sent() Jiri Slaby
2021-11-18 7:31 ` [PATCH 13/19] mxser: clean up timeout handling " Jiri Slaby
2021-11-18 7:31 ` [PATCH 14/19] mxser: don't throttle manually Jiri Slaby
2021-11-18 7:31 ` [PATCH 15/19] mxser: remove tty parameter from mxser_receive_chars_new() Jiri Slaby
2021-11-18 7:31 ` [PATCH 16/19] mxser: increase buf_overrun if tty_insert_flip_char() fails Jiri Slaby
2021-11-18 7:31 ` [PATCH 17/19] mxser: add MOXA prefix to some PCI device IDs Jiri Slaby
2021-11-18 7:31 ` [PATCH 18/19] mxser: move ids from pci_ids.h here Jiri Slaby
2021-11-18 20:58 ` Bjorn Helgaas
2021-11-18 7:31 ` [PATCH 19/19] mxser: use PCI_DEVICE_DATA Jiri Slaby
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