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[3/3] crypto: caam/qi2 - relax busy polling while enqueuing FDs

Message ID 20190211114614.24748-4-horia.geanta@nxp.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series crypto: caam/qi2 - performance-related updates | expand

Commit Message

Horia Geanta Feb. 11, 2019, 11:46 a.m. UTC 
Add cpu_relax() in the loop that tries to enqueue the FDs.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
---
 drivers/crypto/caam/caamalg_qi2.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c
index 6a6a508f5fd2..c2c1abc68f81 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)) {