Author: cem
Date: Thu Oct 29 04:16:52 2015
New Revision: 290132
URL: https://svnweb.freebsd.org/changeset/base/290132
Log:
ioat_test: Handled forced hardware resets gracefully
Sponsored by: EMC / Isilon Storage Division
Modified:
head/sys/dev/ioat/ioat_test.c
Modified: head/sys/dev/ioat/ioat_test.c
==============================================================================
--- head/sys/dev/ioat/ioat_test.c Thu Oct 29 04:16:39 2015
(r290131)
+++ head/sys/dev/ioat/ioat_test.c Thu Oct 29 04:16:52 2015
(r290132)
@@ -284,12 +284,23 @@ ioat_test_submit_1_tx(struct ioat_test *
desc = ioat_blockfill(dma, dest, fillpattern,
tx->length, cb, tx, flags);
}
-
if (desc == NULL)
- panic("Failed to allocate a ring slot "
- "-- this shouldn't happen!");
+ break;
}
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
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