From 6051e79bbfa6111c3a56a86fa8c6ff9a248e30a6 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 18 Jun 2018 16:25:51 +0200 Subject: [PATCH] misc: mic: fix passing the current time I noticed that the mic driver passes a 'struct timespec64' as part of a message into an attached device, where it is used to set the current system time. This won't actually work if one of the two sides runs a 32-bit kernel and the other runs a 64-bit kernel, since the structure layout is different between the two. I found this while replacing calls to the deprecated do_settimeofday64() interface with the modern ktime_get_real_ts() variant, but it seems appropriate to address both at the same time here. To make sure we have a sane structure, let's define our own structure using the layout of the 64-bit kernel. Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mic/cosm/cosm_main.h | 5 ++++- drivers/misc/mic/cosm/cosm_scif_server.c | 6 +++++- drivers/misc/mic/cosm_client/cosm_scif_client.c | 6 +++++- 3 files changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/misc/mic/cosm/cosm_main.h b/drivers/misc/mic/cosm/cosm_main.h index f01156fca881..aa78cdf25e40 100644 --- a/drivers/misc/mic/cosm/cosm_main.h +++ b/drivers/misc/mic/cosm/cosm_main.h @@ -45,7 +45,10 @@ struct cosm_msg { u64 id; union { u64 shutdown_status; - struct timespec64 timespec; + struct { + u64 tv_sec; + u64 tv_nsec; + } timespec; }; }; diff --git a/drivers/misc/mic/cosm/cosm_scif_server.c b/drivers/misc/mic/cosm/cosm_scif_server.c index 05a63286741c..e94b7eac4a06 100644 --- a/drivers/misc/mic/cosm/cosm_scif_server.c +++ b/drivers/misc/mic/cosm/cosm_scif_server.c @@ -179,9 +179,13 @@ static void cosm_set_crashed(struct cosm_device *cdev) static void cosm_send_time(struct cosm_device *cdev) { struct cosm_msg msg = { .id = COSM_MSG_SYNC_TIME }; + struct timespec64 ts; int rc; - getnstimeofday64(&msg.timespec); + ktime_get_real_ts64(&ts); + msg.timespec.tv_sec = ts.tv_sec; + msg.timespec.tv_nsec = ts.tv_nsec; + rc = scif_send(cdev->epd, &msg, sizeof(msg), SCIF_SEND_BLOCK); if (rc < 0) dev_err(&cdev->dev, "%s %d scif_send failed rc %d\n", diff --git a/drivers/misc/mic/cosm_client/cosm_scif_client.c b/drivers/misc/mic/cosm_client/cosm_scif_client.c index beafc0da4027..225078cb51fd 100644 --- a/drivers/misc/mic/cosm_client/cosm_scif_client.c +++ b/drivers/misc/mic/cosm_client/cosm_scif_client.c @@ -63,7 +63,11 @@ static struct notifier_block cosm_reboot = { /* Set system time from timespec value received from the host */ static void cosm_set_time(struct cosm_msg *msg) { - int rc = do_settimeofday64(&msg->timespec); + struct timespec64 ts = { + .tv_sec = msg->timespec.tv_sec, + .tv_nsec = msg->timespec.tv_nsec, + }; + int rc = do_settimeofday64(&ts); if (rc) dev_err(&client_spdev->dev, "%s: %d settimeofday rc %d\n",