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Check we don't exhaust the entire unsigned 32 bit ntime range when rolling time to cope with extremely high hashrates.

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This commit is contained in:
Con Kolivas 2012-06-27 22:34:46 +10:00
parent fab619ad38
commit 522f620c89
1 changed files with 8 additions and 3 deletions
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11
cgminer.c
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@ -3646,13 +3646,17 @@ static inline bool can_roll(struct work *work)
return (work->pool && !stale_work(work, false) && work->rolltime && !work->clone); return (work->pool && !stale_work(work, false) && work->rolltime && !work->clone);
} }
static void roll_work(struct work *work) static bool roll_work(struct work *work)
{ {
uint32_t *work_ntime; uint32_t *work_ntime;
uint32_t ntime; uint32_t ntime;
work_ntime = (uint32_t *)(work->data + 68); work_ntime = (uint32_t *)(work->data + 68);
ntime = be32toh(*work_ntime); ntime = be32toh(*work_ntime);
if (unlikely(ntime == 0xFFFFFFFF)) {
applog(LOG_DEBUG, "Exhausted ntime space, cannot roll work");
return false;
}
ntime++; ntime++;
*work_ntime = htobe32(ntime); *work_ntime = htobe32(ntime);
local_work++; local_work++;
@ -3663,13 +3667,14 @@ static void roll_work(struct work *work)
/* This is now a different work item so it needs a different ID for the /* This is now a different work item so it needs a different ID for the
* hashtable */ * hashtable */
work->id = total_work++; work->id = total_work++;
return true;
} }
static bool reuse_work(struct work *work) static bool reuse_work(struct work *work)
{ {
if (can_roll(work) && should_roll(work)) { if (can_roll(work) && should_roll(work)) {
roll_work(work); if (likely(roll_work(work)))
return true; return true;
} }
return false; return false;
} }