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| author | Arnd Bergmann <arnd@arndb.de> | 2017-11-02 12:42:00 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-11-02 08:27:21 -0600 |
| commit | 474f5da2354e9fd5376b968e4c5a0f1807dc19e8 (patch) | |
| tree | b044445f66d4541155eaada9c57f04650127d7bf /drivers/block | |
| parent | c091fbe9a26ee116d99e2c0ed010afb957a10365 (diff) | |
| download | op-kernel-dev-474f5da2354e9fd5376b968e4c5a0f1807dc19e8.zip op-kernel-dev-474f5da2354e9fd5376b968e4c5a0f1807dc19e8.tar.gz | |
skd: use ktime_get_real_seconds()
Like many storage drivers, skd uses an unsigned 32-bit number for
interchanging the current time with the firmware. This will overflow in
y2106 and is otherwise safe.
However, the get_seconds() function is generally considered deprecated
since the behavior is different between 32-bit and 64-bit architectures,
and using it may indicate a bigger problem.
To annotate that we've thought about this, let's add a comment here
and migrate to the ktime_get_real_seconds() function that consistently
returns a 64-bit number.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/skd_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c index 7cedb42..802ab9f 100644 --- a/drivers/block/skd_main.c +++ b/drivers/block/skd_main.c @@ -1967,7 +1967,8 @@ static void skd_isr_msg_from_dev(struct skd_device *skdev) break; case FIT_MTD_CMD_LOG_HOST_ID: - skdev->connect_time_stamp = get_seconds(); + /* hardware interface overflows in y2106 */ + skdev->connect_time_stamp = (u32)ktime_get_real_seconds(); data = skdev->connect_time_stamp & 0xFFFF; mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_LO, 0, data); SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
