linux-kernel - [PATCH 4.9 074/103] scsi: smartpqi: fix time handling

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Date:   Thu, 11 May 2017 16:12:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Don Brace <don.brace@...rosemi.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.9 074/103] scsi: smartpqi: fix time handling

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@...db.de>

commit ed10858eadd4988260c6bc7d75fc25176342b5a7 upstream.

When we have turned off RTC support, the smartpqi driver fails to build:

ERROR: "rtc_time64_to_tm" [drivers/scsi/smartpqi/smartpqi.ko] undefined!

This is easily avoided by using the generic 'struct tm' based helper rather
than the RTC specific one. While fixing this, I noticed that even though
the driver uses time64_t for storing seconds, it gets them from the
old 32-bit struct timeval. To address this, we can simplify the code
by calling ktime_get_real_seconds() directly.

Fixes: 6c223761eb54 ("smartpqi: initial commit of Microsemi smartpqi driver")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Don Brace <don.brace@...rosemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/smartpqi/smartpqi_init.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -533,8 +533,7 @@ static int pqi_write_current_time_to_hos
 	size_t buffer_length;
 	time64_t local_time;
 	unsigned int year;
-	struct timeval time;
-	struct rtc_time tm;
+	struct tm tm;

 	buffer_length = sizeof(*buffer);

@@ -551,9 +550,8 @@ static int pqi_write_current_time_to_hos
 	put_unaligned_le16(sizeof(buffer->time),
 		&buffer->time_length);

-	do_gettimeofday(&time);
-	local_time = time.tv_sec - (sys_tz.tz_minuteswest * 60);
-	rtc_time64_to_tm(local_time, &tm);
+	local_time = ktime_get_real_seconds();
+	time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 	year = tm.tm_year + 1900;

 	buffer->time[0] = bin2bcd(tm.tm_hour);