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* [PATCH v1 for-rc] RDMA/siw: Fix page address mapping in TX path
@ 2019-09-09 13:24 Bernard Metzler
  2019-09-12 14:50 ` Jason Gunthorpe
  0 siblings, 1 reply; 2+ messages in thread
From: Bernard Metzler @ 2019-09-09 13:24 UTC (permalink / raw)
  To: linux-rdma; +Cc: krishna2, dledford, Bernard Metzler

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.

Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Fixes: b9be6f18cf9e rdma/siw: transmit path
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
---
 drivers/infiniband/sw/siw/siw_qp_tx.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 438a2917a47c..8e72f955921d 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -518,11 +518,12 @@ 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 va = sge->laddr + sge_off;
 
-- 
2.17.2


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH v1 for-rc] RDMA/siw: Fix page address mapping in TX path
  2019-09-09 13:24 [PATCH v1 for-rc] RDMA/siw: Fix page address mapping in TX path Bernard Metzler
@ 2019-09-12 14:50 ` Jason Gunthorpe
  0 siblings, 0 replies; 2+ messages in thread
From: Jason Gunthorpe @ 2019-09-12 14:50 UTC (permalink / raw)
  To: Bernard Metzler; +Cc: linux-rdma, krishna2, dledford

On Mon, Sep 09, 2019 at 03:24:27PM +0200, Bernard Metzler wrote:
> 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.
> 
> Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
> Fixes: b9be6f18cf9e rdma/siw: transmit path
> Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
> ---
>  drivers/infiniband/sw/siw/siw_qp_tx.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)

Applied to for-next, thanks

Jason

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2019-09-09 13:24 [PATCH v1 for-rc] RDMA/siw: Fix page address mapping in TX path Bernard Metzler
2019-09-12 14:50 ` Jason Gunthorpe

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