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RDMA/siw: Fix page address mapping in TX path 

Use the correct kmap()/kunmap() flow to determine page address used for
CRC computation. Using page_address() is wrong, since page might be in
highmem.

Fixes: b9be6f18cf ("rdma/siw: transmit path")
Link: https://lore.kernel.org/r/20190909132427.30264-1-bmt@zurich.ibm.com
Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Bernard Metzler 2019-09-09 15:24:27 +02:00 committed by Jason Gunthorpe
parent 4a9d46a9fe
commit 0404bd629f
1 changed files with 6 additions and 5 deletions
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11
drivers/infiniband/sw/siw/siw_qp_tx.c
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@ -520,11 +520,12 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s)
c_tx->mpa_crc_hd,
iov[seg].iov_base,
plen);
} else if (do_crc)
crypto_shash_update(
c_tx->mpa_crc_hd,
page_address(p) + fp_off,
plen);
} else if (do_crc) {
crypto_shash_update(c_tx->mpa_crc_hd,
kmap(p) + fp_off,
plen);
kunmap(p);
}
} else {
u64 pa = ((sge->laddr + sge_off) & PAGE_MASK);