FAILED: patch "[PATCH] USB: serial: usb_wwan: fix TIOCSSERIAL jiffies conversions" failed to apply to 4.9-stable tree
From: <gregkh@linuxfoundation.org>
Date: 2021-05-12 08:29:22
Subsystem:
the rest, usb serial subsystem, usb subsystem · Maintainers:
Linus Torvalds, Johan Hovold, Greg Kroah-Hartman
The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to [off-list ref].
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 3d732690d2267f4d0e19077b178dffbedafdf0c9 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 7 Apr 2021 12:39:16 +0200
Subject: [PATCH] USB: serial: usb_wwan: fix TIOCSSERIAL jiffies conversions
The port close_delay and closing_wait parameters set by TIOCSSERIAL are
specified in jiffies and not milliseconds.
Add the missing conversions so that the TIOCSSERIAL works as expected
also when HZ is not 1000.
Fixes: 02303f73373a ("usb-wwan: implement TIOCGSERIAL and TIOCSSERIAL to avoid blocking close(2)")
Cc: stable@vger.kernel.org # 2.6.38
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 46d46a4f99c9..4e9c994a972a 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c@@ -140,10 +140,10 @@ int usb_wwan_get_serial_info(struct tty_struct *tty, ss->line = port->minor; ss->port = port->port_number; ss->baud_base = tty_get_baud_rate(port->port.tty); - ss->close_delay = port->port.close_delay / 10; + ss->close_delay = jiffies_to_msecs(port->port.close_delay) / 10; ss->closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? ASYNC_CLOSING_WAIT_NONE : - port->port.closing_wait / 10; + jiffies_to_msecs(port->port.closing_wait) / 10; return 0; } EXPORT_SYMBOL(usb_wwan_get_serial_info);
@@ -155,9 +155,10 @@ int usb_wwan_set_serial_info(struct tty_struct *tty, unsigned int closing_wait, close_delay; int retval = 0; - close_delay = ss->close_delay * 10; + close_delay = msecs_to_jiffies(ss->close_delay * 10); closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? - ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10; + ASYNC_CLOSING_WAIT_NONE : + msecs_to_jiffies(ss->closing_wait * 10); mutex_lock(&port->port.mutex);