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FAILED: patch "[PATCH] staging: greybus: uart: fix TIOCSSERIAL jiffies conversions" failed to apply to 4.19-stable tree

PATCH [email protected] 1 participant 1 message May 12, 2021

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Stable branch Staging Greybus Greybus UART protocols drivers
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The patch below does not apply to the 4.19-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 <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From b71e571adaa58be4fd289abebc8997e05b4c6b40 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Wed, 7 Apr 2021 12:23:23 +0200
Subject: [PATCH] staging: greybus: uart: 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 TIOCSSERIAL works as expected also when HZ is not 1000.

Fixes e68453ed28c5 ("greybus: uart-gb: now builds, more framework added")
Cc [email protected] # 4.9
Signed-off-by Johan Hovold <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
drivers/staging/greybus/uart.c +7 -4
index 607378bfebb7..29846dc1e1bf 100644
@@ -614,10 +614,12 @@ static int get_serial_info(struct tty_struct *tty,
 	ss->line = gb_tty->minor;
 	ss->xmit_fifo_size = 16;
 	ss->baud_base = 9600;
-	ss->close_delay = gb_tty->port.close_delay / 10;
+	ss->close_delay = jiffies_to_msecs(gb_tty->port.close_delay) / 10;
 	ss->closing_wait =
 		gb_tty->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
-		ASYNC_CLOSING_WAIT_NONE : gb_tty->port.closing_wait / 10;
+		ASYNC_CLOSING_WAIT_NONE :
+		jiffies_to_msecs(gb_tty->port.closing_wait) / 10;
+
 	return 0;
 }
 

@@ -629,9 +631,10 @@ static int set_serial_info(struct tty_struct *tty,
 	unsigned int 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(&gb_tty->port.mutex);
 	if (!capable(CAP_SYS_ADMIN)) {