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Avoid crash on NULL timers.

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This is a rework of Stefan Weil proposed patch.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3283 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
j_mayer 2007-09-30 01:29:07 +00:00
parent c80f84e3c0
commit 868d585ace
1 changed files with 8 additions and 10 deletions
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8
hw/m48t59.c
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@ -161,11 +161,10 @@ static void set_alarm (m48t59_t *NVRAM, struct tm *tm)
NVRAM->alarm = mktime(tm);
if (NVRAM->alrm_timer != NULL) {
qemu_del_timer(NVRAM->alrm_timer);
NVRAM->alrm_timer = NULL;
}
if (NVRAM->alarm - time(NULL) > 0)
qemu_mod_timer(NVRAM->alrm_timer, NVRAM->alarm * 1000);
}
}
/* Watchdog management */
static void watchdog_cb (void *opaque)
@ -188,17 +187,16 @@ static void set_up_watchdog (m48t59_t *NVRAM, uint8_t value)
{
uint64_t interval; /* in 1/16 seconds */
NVRAM->buffer[0x1FF0] &= ~0x80;
if (NVRAM->wd_timer != NULL) {
qemu_del_timer(NVRAM->wd_timer);
NVRAM->wd_timer = NULL;
}
NVRAM->buffer[0x1FF0] &= ~0x80;
if (value != 0) {
interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F);
qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) +
((interval * 1000) >> 4));
}
}
}
/* Direct access to NVRAM */
void m48t59_write (m48t59_t *NVRAM, uint32_t addr, uint32_t val)