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Subject[PATCH] [media] pulse8-cec: print time using time64_t.
Date
The firmware timestamp is an unsigned 32-bit value, but we copy it into
a signed 32-bit variable, so we can theoretically get an overflow in
the calculation when the timestamp is between 2038 and 2106.

This changes the temporary variable to time64_t and changes the deprecated
time_to_tm() over to time64_to_tm() accordingly.

There is still an overflow in y2106, but that is a limitation of the
firmware interface, not a kernel problem.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/media/usb/pulse8-cec/pulse8-cec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/pulse8-cec/pulse8-cec.c b/drivers/media/usb/pulse8-cec/pulse8-cec.c
index 50146f263d90..350635826aae 100644
--- a/drivers/media/usb/pulse8-cec/pulse8-cec.c
+++ b/drivers/media/usb/pulse8-cec/pulse8-cec.c
@@ -329,7 +329,7 @@ static int pulse8_setup(struct pulse8 *pulse8, struct serio *serio,
u8 cmd[2];
int err;
struct tm tm;
- time_t date;
+ time64_t date;

pulse8->vers = 0;

@@ -349,7 +349,7 @@ static int pulse8_setup(struct pulse8 *pulse8, struct serio *serio,
if (err)
return err;
date = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
- time_to_tm(date, 0, &tm);
+ time64_to_tm(date, 0, &tm);
dev_info(pulse8->dev, "Firmware build date %04ld.%02d.%02d %02d:%02d:%02d\n",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
--
2.9.0
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