This is a note to let you know that I've just added the patch titled gnss: serial: fix synchronous write timeout to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: gnss-serial-fix-synchronous-write-timeout.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 56a6c7268312cba9436b84cac01b3e502c5c511d Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Wed, 14 Nov 2018 09:33:57 +0100 Subject: gnss: serial: fix synchronous write timeout From: Johan Hovold <johan@xxxxxxxxxx> commit 56a6c7268312cba9436b84cac01b3e502c5c511d upstream. Passing a timeout of zero to the synchronous serdev_device_write() helper does currently not imply to wait forever (unlike passing zero to serdev_device_wait_until_sent()). Instead, if there's insufficient room in the write buffer, we'd end up with an incomplete write. Fixes: 37768b054f20 ("gnss: add generic serial driver") Cc: stable <stable@xxxxxxxxxxxxxxx> # 4.19 Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gnss/serial.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gnss/serial.c +++ b/drivers/gnss/serial.c @@ -13,6 +13,7 @@ #include <linux/of.h> #include <linux/pm.h> #include <linux/pm_runtime.h> +#include <linux/sched.h> #include <linux/serdev.h> #include <linux/slab.h> @@ -63,7 +64,7 @@ static int gnss_serial_write_raw(struct int ret; /* write is only buffered synchronously */ - ret = serdev_device_write(serdev, buf, count, 0); + ret = serdev_device_write(serdev, buf, count, MAX_SCHEDULE_TIMEOUT); if (ret < 0) return ret; Patches currently in stable-queue which might be from johan@xxxxxxxxxx are queue-4.19/gnss-serial-fix-synchronous-write-timeout.patch queue-4.19/mtd-rawnand-atmel-fix-of-child-node-lookup.patch queue-4.19/clk-ti-fix-of-child-node-lookup.patch queue-4.19/gnss-sirf-fix-synchronous-write-timeout.patch