From: Claire Chang <tientzu@chromium.org>
To: robh@kernel.org, gregkh@linuxfoundation.org, jslaby@suse.com,
long.cheng@mediatek.com, changqi.hu@mediatek.com
Cc: linux-serial@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-kernel@vger.kernel.org, Claire Chang <tientzu@chromium.org>
Subject: [PATCH 1/3] serdev: ttyport: add devt for tty port
Date: Wed, 6 May 2020 15:23:12 +0800 [thread overview]
Message-ID: <20200506072314.112409-2-tientzu@chromium.org> (raw)
In-Reply-To: <20200506072314.112409-1-tientzu@chromium.org>
serial_match_port() uses devt to match devices. However, when serdev
registers a tty port, devt has never been set. This makes
device_find_child() always return NULL.
Assign devt in serdev_tty_port_register() to fix this.
Signed-off-by: Claire Chang <tientzu@chromium.org>
---
drivers/tty/serdev/serdev-ttyport.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index d367803e2044f..9238119173a47 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -267,6 +267,7 @@ struct device *serdev_tty_port_register(struct tty_port *port,
{
struct serdev_controller *ctrl;
struct serport *serport;
+ dev_t devt = MKDEV(drv->major, drv->minor_start) + idx;
int ret;
if (!port || !drv || !parent)
@@ -282,6 +283,7 @@ struct device *serdev_tty_port_register(struct tty_port *port,
serport->tty_drv = drv;
ctrl->ops = &ctrl_ops;
+ ctrl->dev.devt = devt;
port->client_ops = &client_ops;
port->client_data = ctrl;
--
2.26.2.526.g744177e7f7-goog
next prev parent reply other threads:[~2020-05-06 7:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-06 7:23 [PATCH 0/3] add wakeup_irq for in-band wakeup support Claire Chang
2020-05-06 7:23 ` Claire Chang [this message]
2020-05-15 12:46 ` [PATCH 1/3] serdev: ttyport: add devt for tty port Greg KH
2020-05-18 10:04 ` Claire Chang
2020-05-18 14:56 ` Johan Hovold
2020-05-06 7:23 ` [PATCH 2/3] tty: serial_core: add wakeup_irq to support in-band wakeup Claire Chang
2020-05-06 7:23 ` [PATCH 3/3] uart: mediatek: move the in-band wakeup logic to core Claire Chang
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