From: Corey Minyard <cminyard@mvista.com>
Date: Wed, 25 Jan 2023 10:11:06 -0600
Subject: [PATCH] ipmi:ssif: resend_msg() cannot fail
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 95767ed78a181d5404202627499f9cde56053b96

commit 95767ed78a181d5404202627499f9cde56053b96 upstream.

The resend_msg() function cannot fail, but there was error handling
around using it.  Rework the handling of the error, and fix the out of
retries debug reporting that was wrong around this, too.

Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/char/ipmi/ipmi_ssif.c | 28 +++++++---------------------
 1 file changed, 7 insertions(+), 21 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 4bfd1e30..146409d2 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -602,7 +602,7 @@ static void ssif_alert(struct i2c_client *client, enum i2c_alert_protocol type,
 		start_get(ssif_info);
 }
 
-static int start_resend(struct ssif_info *ssif_info);
+static void start_resend(struct ssif_info *ssif_info);
 
 static void msg_done_handler(struct ssif_info *ssif_info, int result,
 			     unsigned char *data, unsigned int len)
@@ -909,31 +909,17 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result,
 	if (result < 0) {
 		ssif_info->retries_left--;
 		if (ssif_info->retries_left > 0) {
-			if (!start_resend(ssif_info)) {
-				ssif_inc_stat(ssif_info, send_retries);
-				return;
-			}
-			/* request failed, just return the error. */
-			ssif_inc_stat(ssif_info, send_errors);
-
-			if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
-				dev_dbg(&ssif_info->client->dev,
-					"%s: Out of retries\n", __func__);
-			msg_done_handler(ssif_info, -EIO, NULL, 0);
+			start_resend(ssif_info);
 			return;
 		}
 
 		ssif_inc_stat(ssif_info, send_errors);
 
-		/*
-		 * Got an error on transmit, let the done routine
-		 * handle it.
-		 */
 		if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
 			dev_dbg(&ssif_info->client->dev,
-				"%s: Error  %d\n", __func__, result);
+				"%s: Out of retries\n", __func__);
 
-		msg_done_handler(ssif_info, result, NULL, 0);
+		msg_done_handler(ssif_info, -EIO, NULL, 0);
 		return;
 	}
 
@@ -996,7 +982,7 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result,
 	}
 }
 
-static int start_resend(struct ssif_info *ssif_info)
+static void start_resend(struct ssif_info *ssif_info)
 {
 	int command;
 
@@ -1021,7 +1007,6 @@ static int start_resend(struct ssif_info *ssif_info)
 
 	ssif_i2c_send(ssif_info, msg_written_handler, I2C_SMBUS_WRITE,
 		   command, ssif_info->data, I2C_SMBUS_BLOCK_DATA);
-	return 0;
 }
 
 static int start_send(struct ssif_info *ssif_info,
@@ -1036,7 +1021,8 @@ static int start_send(struct ssif_info *ssif_info,
 	ssif_info->retries_left = SSIF_SEND_RETRIES;
 	memcpy(ssif_info->data + 1, data, len);
 	ssif_info->data_len = len;
-	return start_resend(ssif_info);
+	start_resend(ssif_info);
+	return 0;
 }
 
 /* Must be called with the message lock held. */
-- 
2.35.3