crypto: cryptd - Add cryptd_max_cpu_qlen module parameter

Make the cryptd queue length configurable. We recently had customer where this
needed to be tuned to accommodate the aesni_intel module and prevent packet
drop.

Signed-off-by: Jon Maxwell <jmaxwell37@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 5 insertions, 2 deletions

diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index bd43cf5be14c..b1eb131c0f10 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -32,7 +32,9 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 
-#define CRYPTD_MAX_CPU_QLEN 1000
+unsigned int cryptd_max_cpu_qlen = 1000;
+module_param(cryptd_max_cpu_qlen, uint, 0);
+MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
 
 struct cryptd_cpu_queue {
         struct crypto_queue queue;
@@ -116,6 +118,7 @@ static int cryptd_init_queue(struct cryptd_queue *queue,
                 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
                 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
         }
+        pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
         return 0;
 }
 
@@ -1372,7 +1375,7 @@ static int __init cryptd_init(void)
 {
         int err;
 
-        err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
+        err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
         if (err)
                 return err;