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ioat_test: Handled forced hardware resets gracefully

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Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
cem 2015-10-29 04:16:52 +00:00
parent 159d29dfc4
commit 53fac20993
1 changed files with 14 additions and 3 deletions
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17
sys/dev/ioat/ioat_test.c
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@ -284,12 +284,23 @@ ioat_test_submit_1_tx(struct ioat_test *test, bus_dmaengine_t dma)
desc = ioat_blockfill(dma, dest, fillpattern, desc = ioat_blockfill(dma, dest, fillpattern,
tx->length, cb, tx, flags); tx->length, cb, tx, flags);
} }
if (desc == NULL) if (desc == NULL)
panic("Failed to allocate a ring slot " break;
"-- this shouldn't happen!");
} }
ioat_release(dma); ioat_release(dma);
/*
* We couldn't issue an IO -- either the device is being detached or
* the HW reset. Essentially spin until the device comes back up or
* our timer expires.
*/
if (desc == NULL && tx->depth > 0) {
atomic_add_32(&test->status[IOAT_TEST_NO_DMA_ENGINE], tx->depth);
IT_LOCK();
TAILQ_REMOVE(&test->pend_q, tx, entry);
TAILQ_INSERT_HEAD(&test->free_q, tx, entry);
IT_UNLOCK();
}
} }
static void static void