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parisc: check return value of down_interruptible() in hp_sdc_rtc.c 

additionally comment out unused code (which may be used later)

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2013-02-27 22:46:56 +01:00
parent d8d0524a39
commit 15fb9683c3
1 changed files with 12 additions and 3 deletions
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15
drivers/input/misc/hp_sdc_rtc.c
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@ -109,7 +109,9 @@ static int hp_sdc_rtc_do_read_bbrtc (struct rtc_time *rtctm)
if (hp_sdc_enqueue_transaction(&t)) return -1;
down_interruptible(&tsem); /* Put ourselves to sleep for results. */
/* Put ourselves to sleep for results. */
if (WARN_ON(down_interruptible(&tsem)))
return -1;
/* Check for nonpresence of BBRTC */
if (!((tseq[83] | tseq[90] | tseq[69] | tseq[76] |
@ -176,11 +178,16 @@ static int64_t hp_sdc_rtc_read_i8042timer (uint8_t loadcmd, int numreg)
t.seq = tseq;
t.act.semaphore = &i8042tregs;
down_interruptible(&i8042tregs); /* Sleep if output regs in use. */
/* Sleep if output regs in use. */
if (WARN_ON(down_interruptible(&i8042tregs)))
return -1;
if (hp_sdc_enqueue_transaction(&t)) return -1;
down_interruptible(&i8042tregs); /* Sleep until results come back. */
/* Sleep until results come back. */
if (WARN_ON(down_interruptible(&i8042tregs)))
return -1;
up(&i8042tregs);
return (tseq[5] |
@ -276,6 +283,7 @@ static inline int hp_sdc_rtc_read_ct(struct timeval *res) {
}
#if 0 /* not used yet */
/* Set the i8042 real-time clock */
static int hp_sdc_rtc_set_rt (struct timeval *setto)
{
@ -386,6 +394,7 @@ static int hp_sdc_rtc_set_i8042timer (struct timeval *setto, uint8_t setcmd)
}
return 0;
}
#endif
static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos) {