On Mon, Dec 14, 2009 at 6:33 AM, Vishnu Suresh <Vishnu@xxxxxxxxxxxxx> wrote: > The async_tx descriptors contains dangling pointers. > Hence, re-initialize them to NULL before use. > > Signed-off-by: Vishnu Suresh <Vishnu@xxxxxxxxxxxxx> > --- > o. Rebased to linux-next as of 20091214 > > drivers/crypto/talitos.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c > index 87f06be..9e261c6 100644 > --- a/drivers/crypto/talitos.c > +++ b/drivers/crypto/talitos.c > @@ -952,6 +952,9 @@ static struct dma_async_tx_descriptor * talitos_prep_dma_xor( > return NULL; > } > dma_async_tx_descriptor_init(&new->async_tx, &xor_chan->common); > + new->async_tx.parent = NULL; > + new->async_tx.next = NULL; > + > > desc = &new->hwdesc; > /* Set destination: Last pointer pair */ These two values are owned by the async_tx api, drivers are not supposed to touch them. Both iop_adma and the new ppx4xx driver (which use the async_tx channel switching capability) get away without touching these fields which makes me suspect there is a misunderstanding/bug somewhere else in the talitos implementation. Also that dma_async_tx_descriptor_init() is unexpected in the hot path, it's only needed at initial descriptor allocation. End result I think this driver needs some more time to brew. -- Dan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
