From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>,
Michal Simek <michal.simek@xilinx.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sasha Levin <sashal@kernel.org>,
linux-serial@vger.kernel.org
Subject: [PATCH AUTOSEL 5.2 067/171] serial: uartps: Use the same dynamic major number for all ports
Date: Thu, 18 Jul 2019 23:54:58 -0400 [thread overview]
Message-ID: <20190719035643.14300-67-sashal@kernel.org> (raw)
In-Reply-To: <20190719035643.14300-1-sashal@kernel.org>
From: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
[ Upstream commit ab262666018de6f4e206b021386b93ed0c164316 ]
Let kernel to find out major number dynamically for the first device and
then reuse it for other instances.
This fixes the issue that each uart is registered with a
different major number.
After the patch:
crw------- 1 root root 253, 0 Jun 10 08:31 /dev/ttyPS0
crw--w---- 1 root root 253, 1 Jan 1 1970 /dev/ttyPS1
Fixes: 024ca329bfb9 ("serial: uartps: Register own uart console and driver structures")
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/tty/serial/xilinx_uartps.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 605354fd60b1..9dcc4d855ddd 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -29,12 +29,12 @@
#define CDNS_UART_TTY_NAME "ttyPS"
#define CDNS_UART_NAME "xuartps"
-#define CDNS_UART_MAJOR 0 /* use dynamic node allocation */
#define CDNS_UART_FIFO_SIZE 64 /* FIFO size */
#define CDNS_UART_REGISTER_SPACE 0x1000
/* Rx Trigger level */
static int rx_trigger_level = 56;
+static int uartps_major;
module_param(rx_trigger_level, uint, S_IRUGO);
MODULE_PARM_DESC(rx_trigger_level, "Rx trigger level, 1-63 bytes");
@@ -1517,7 +1517,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
cdns_uart_uart_driver->owner = THIS_MODULE;
cdns_uart_uart_driver->driver_name = driver_name;
cdns_uart_uart_driver->dev_name = CDNS_UART_TTY_NAME;
- cdns_uart_uart_driver->major = CDNS_UART_MAJOR;
+ cdns_uart_uart_driver->major = uartps_major;
cdns_uart_uart_driver->minor = cdns_uart_data->id;
cdns_uart_uart_driver->nr = 1;
@@ -1546,6 +1546,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
goto err_out_id;
}
+ uartps_major = cdns_uart_uart_driver->tty_driver->major;
cdns_uart_data->cdns_uart_driver = cdns_uart_uart_driver;
/*
--
2.20.1
next prev parent reply other threads:[~2019-07-19 3:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190719035643.14300-1-sashal@kernel.org>
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 011/171] tty: max310x: Fix invalid baudrate divisors calculator Sasha Levin
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 013/171] tty: serial: cpm_uart - fix init when SMC is relocated Sasha Levin
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 048/171] tty/serial: digicolor: Fix digicolor-usart already registered warning Sasha Levin
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 049/171] tty: serial: msm_serial: avoid system lockup condition Sasha Levin
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 050/171] serial: 8250: Fix TX interrupt handling condition Sasha Levin
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 058/171] sunhv: Fix device naming inconsistency between sunhv_console and sunhv_reg Sasha Levin
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 066/171] serial: imx: fix locking in set_termios() Sasha Levin
2019-07-19 3:54 ` Sasha Levin [this message]
2019-07-19 3:54 ` [PATCH AUTOSEL 5.2 068/171] tty: serial_core: Set port active bit in uart_port_activate Sasha Levin
2019-07-19 3:55 ` [PATCH AUTOSEL 5.2 079/171] serial: mctrl_gpio: Check if GPIO property exisits before requesting it Sasha Levin
2019-07-19 3:55 ` [PATCH AUTOSEL 5.2 109/171] serial: sh-sci: Terminate TX DMA during buffer flushing Sasha Levin
2019-07-19 3:55 ` [PATCH AUTOSEL 5.2 110/171] serial: sh-sci: Fix TX DMA buffer flushing and workqueue races Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190719035643.14300-67-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=michal.simek@xilinx.com \
--cc=shubhrajyoti.datta@xilinx.com \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).