From: Horia Geantă <horia.geanta@nxp.com>
Date: Mon, 11 Feb 2019 11:46:14 +0000 (+0200)
Subject: crypto: caam/qi2 - relax busy polling while enqueuing FDs
X-Git-Tag: v5.1-rc1~177^2~28
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=05bd1beec2748d74cbc41ee476be2af0f91bd2d3;p=thirdparty%2Fkernel%2Flinux.git

crypto: caam/qi2 - relax busy polling while enqueuing FDs

Add cpu_relax() in the loop that tries to enqueue the FDs.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c
index 6a6a508f5fd20..c2c1abc68f81e 100644
--- a/drivers/crypto/caam/caamalg_qi2.c
+++ b/drivers/crypto/caam/caamalg_qi2.c
@@ -5277,6 +5277,8 @@ int dpaa2_caam_enqueue(struct device *dev, struct caam_request *req)
 						  &fd);
 		if (err != -EBUSY)
 			break;
+
+		cpu_relax();
 	}
 
 	if (unlikely(err)) {