Patch "crypto: caam - make write transactions bufferable on PPC platforms" has been added to the 4.3-stable tree

Patch "crypto: caam - make write transactions bufferable on PPC platforms" has been added to the 4.3-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    crypto: caam - make write transactions bufferable on PPC platforms

to the 4.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     crypto-caam-make-write-transactions-bufferable-on-ppc-platforms.patch
and it can be found in the queue-4.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From e7a7104e432c0db8469ca3568daf4f1d1afe3e73 Mon Sep 17 00:00:00 2001
From: Horia Geant? <horia.geanta@nxp.com>
Date: Tue, 12 Jan 2016 17:59:29 +0200
Subject: crypto: caam - make write transactions bufferable on PPC platforms

From: Horia Geant? <horia.geanta@nxp.com>

commit e7a7104e432c0db8469ca3568daf4f1d1afe3e73 upstream.

Previous change (see "Fixes" tag) to the MCFGR register
clears AWCACHE[0] ("bufferable" AXI3 attribute) (which is "1" at POR).

This makes all writes non-bufferable, causing a ~ 5% performance drop
for PPC-based platforms.

Rework previous change such that MCFGR[AWCACHE]=4'b0011
(bufferable + cacheable) for all platforms.
Note: For ARM-based platforms, AWCACHE[0] is ignored
by the interconnect IP.

Fixes: f10967495144 ("crypto: caam - fix snooping for write transactions")
Signed-off-by: Horia Geant? <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/caam/ctrl.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -534,8 +534,8 @@ static int caam_probe(struct platform_de
 	 * long pointers in master configuration register
 	 */
 	clrsetbits_32(&ctrl->mcr, MCFGR_AWCACHE_MASK, MCFGR_AWCACHE_CACH |
-		      MCFGR_WDENABLE | (sizeof(dma_addr_t) == sizeof(u64) ?
-					MCFGR_LONG_PTR : 0));
+		      MCFGR_AWCACHE_BUFF | MCFGR_WDENABLE |
+		      (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
 
 	/*
 	 *  Read the Compile Time paramters and SCFGR to determine


Patches currently in stable-queue which might be from horia.geanta@nxp.com are

queue-4.3/crypto-caam-make-write-transactions-bufferable-on-ppc-platforms.patch