[HIFN 09/n]: Fix max queue length value

[Patrick McHardy <kaber@trash.net>]

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commit 21b18f9b22c7aa0a458c3f93fc1771a5eb5e70c8
Author: Patrick McHardy <kaber@trash.net>
Date:   Wed May 7 13:00:10 2008 +0200

    [HIFN]: Fix max queue length value
    
    All but the last element of the command and result descriptor rings can be
    used for crypto requests, fix HIFN_QUEUE_LENGTH.
    
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index b28e8b1..7d19b15 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -371,7 +371,7 @@ static atomic_t hifn_dev_number;
 
 #define HIFN_D_DST_DALIGN		4
 
-#define HIFN_QUEUE_LENGTH		HIFN_D_CMD_RSIZE-5
+#define HIFN_QUEUE_LENGTH		HIFN_D_CMD_RSIZE-1
 
 #define AES_MIN_KEY_SIZE		16
 #define AES_MAX_KEY_SIZE		32