linux-kernel - [PATCH] crypto: atmel-i2c

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Date:   Sun,  8 Mar 2020 14:00:53 +0800
From:   Jianhui Zhao <zhaojh329@...il.com>
To:     herbert@...dor.apana.org.au
Cc:     davem@...emloft.net, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com, ludovic.desroches@...rochip.com,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Jianhui Zhao <zhaojh329@...il.com>
Subject: [PATCH] crypto: atmel-i2c - Fix wakeup fail

The wake token cannot be sent without ignoring the nack for the
device address

Signed-off-by: Jianhui Zhao <zhaojh329@...il.com>
---
 drivers/crypto/atmel-i2c.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c
index 1d3355913b40..13624cde67e8 100644
--- a/drivers/crypto/atmel-i2c.c
+++ b/drivers/crypto/atmel-i2c.c
@@ -3,6 +3,7 @@
  * Microchip / Atmel ECC (I2C) driver.
  *
  * Copyright (c) 2017, Microchip Technology Inc.
+ * Copyright (c) 2020 Jianhui Zhao <zhaojh329@...il.com>
  * Author: Tudor Ambarus <tudor.ambarus@...rochip.com>
  */
 
@@ -176,7 +177,8 @@ static int atmel_i2c_wakeup(struct i2c_client *client)
 	 * device is idle, asleep or during waking up. Don't check for error
 	 * when waking up the device.
 	 */
-	i2c_master_send(client, i2c_priv->wake_token, i2c_priv->wake_token_sz);
+	i2c_transfer_buffer_flags(client, i2c_priv->wake_token,
+				i2c_priv->wake_token_sz, I2C_M_IGNORE_NAK);
 
 	/*
 	 * Wait to wake the device. Typical execution times for ecdh and genkey
-- 
2.17.1