Re: http://bugzilla.kernel.org/show_bug.cgi?id=11742

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Hi,

> Is the culprit REQ_TYPE_BLOCK_PC request or REQ_TYPE_ATA_PC one?

Well, from what I see from the latest traces Valerio sent me, it is always a
REQ_TYPE_BLOCK_PC with sizes for rq->data_len which fail in the alignment test:

rq->data_len: 0xc,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,
rq->data_len: 0xf810,

Those are, according to Valerio, taken during burning which looks like something
aroung 64K requests which fail the rq->data_len & alignment test where alignment
is 0x1f. The would've passed the old test rq->data_len & 0xf.

/me researching DMA alignment requirements...

-- 
Regards/Gruss,
    Boris.
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