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[CHAR] ds1286: Fix handling of seconds in RTC_ALM_SET ioctl.

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o Fix use of uninitialized variable sec.
 o Make the RTC_ALM_SET ioctl return -EINVAL for non-zero seconds - the
   DS1286 has no second field for the alarm time.
 o Replace the obscure BIN_TO_BCD macro with BIN2BCD.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2007-03-08 00:14:25 +00:00
parent 455921451a
commit b35692ebde
1 changed files with 6 additions and 3 deletions
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9
drivers/char/ds1286.c
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@ -197,6 +197,7 @@ static int ds1286_ioctl(struct inode *inode, struct file *file,
hrs = alm_tm.tm_hour;
min = alm_tm.tm_min;
sec = alm_tm.tm_sec;
if (hrs >= 24)
hrs = 0xff;
@ -204,9 +205,11 @@ static int ds1286_ioctl(struct inode *inode, struct file *file,
if (min >= 60)
min = 0xff;
BIN_TO_BCD(sec);
BIN_TO_BCD(min);
BIN_TO_BCD(hrs);
if (sec != 0)
return -EINVAL;
min = BIN2BCD(min);
min = BIN2BCD(hrs);
spin_lock(&ds1286_lock);
rtc_write(hrs, RTC_HOURS_ALARM);