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crypto: talitos - Preempt overflow interrupts off-by-one fix 

In commit ec6644d632 "crypto: talitos - Preempt
overflow interrupts", the test in atomic_inc_not_zero was interpreted by the
author to be applied after the increment operation (not before). This off-by-one
fix prevents overflow error interrupts from occurring when requests are frequent
and large enough to do so.

Signed-off-by: Vishnu Suresh <Vishnu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Vishnu Suresh 2008-10-20 21:06:18 +08:00 committed by Herbert Xu
parent 32bd78e0a5
commit 4b24ea971a
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/talitos.c
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@ -1598,7 +1598,7 @@ static int talitos_probe(struct of_device *ofdev,
goto err_out;
}
for (i = 0; i < priv->num_channels; i++)
atomic_set(&priv->submit_count[i], -priv->chfifo_len);
atomic_set(&priv->submit_count[i], -(priv->chfifo_len - 1));
priv->head = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL);
priv->tail = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL);