linux-kernel - crypto: tcrypt - Do not bail on EINPROGRESS in multibuffer hash test

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Date:	Thu, 30 Jun 2016 11:00:13 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Megha Dey <megha.dey@...ux.intel.com>
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>
Subject: crypto: tcrypt - Do not bail on EINPROGRESS in multibuffer hash test

On Wed, Jun 29, 2016 at 10:45:56AM -0700, Megha Dey wrote:
> I tested the latest cryptodev tree on my haswell machine and this is
> what I see:
> [   40.402834] modprobe tcrypt mode=422
> [   40.403105] testing speed of multibuffer sha1 (sha1_mb)
> [   40.403108] test  0 (   16 byte blocks,   16 bytes per update,   1
> updates):  32271 cycles/operation,  252 cycles/byte
> [   40.403118] At least one hashing failed ret=-115
> [   43.218712] modprobe tcrypt mode=423
> [   43.218712] testing speed of multibuffer sha256 (sha256_mb)
> [   43.218715] test  0 (   16 byte blocks,   16 bytes per update,   1
> updates): 106965 cycles/operation,  835 cycles/byte
> [   43.218747] At least one hashing failed ret=-115
> [   45.346657] modprobe tcrypt mode=424
> [   45.346657] testing speed of multibuffer sha512 (sha512_mb)
> [   45.346660] test  0 (   16 byte blocks,   16 bytes per update,   1
> updates):  43179 cycles/operation,  337 cycles/byte
> [   45.346673] At least one hashing failed ret=-115
> 
> Don't think this is expected, is it?

No that's not right.  Does this patch fix it?

Thanks!

---8<---
The multibuffer hash speed test is incorrectly bailing because
of an EINPROGRESS return value.  This patch fixes it by setting
ret to zero if it is equal to -EINPROGRESS.

Reported-by: Megha Dey <megha.dey@...ux.intel.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 8a91dc3..202cfa1 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -655,8 +486,10 @@ static void test_mb_ahash_speed(const char *algo, unsigned int sec,
 
 		for (k = 0; k < 8; k++) {
 			ret = crypto_ahash_digest(data[k].req);
-			if (ret == -EINPROGRESS)
+			if (ret == -EINPROGRESS) {
+				ret = 0;
 				continue;
+			}
 
 			if (ret)
 				break;
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt