linux-kernel - [PATCH] platform/chrome: cros_ec_lpc: Fix error code in cros_ec_lpc_mec_read

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Message-ID: <e0b43fb5-ecc8-4fb4-9b76-c06dea8cc4c4@moroto.mountain>
Date: Thu, 13 Jun 2024 16:55:14 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Ben Walsh <ben@...nut.com>
Cc: Benson Leung <bleung@...omium.org>, Tzung-Bi Shih <tzungbi@...nel.org>,
	Guenter Roeck <groeck@...omium.org>,
	chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH] platform/chrome: cros_ec_lpc: Fix error code in
 cros_ec_lpc_mec_read_bytes()

We changed these functions to returning negative error codes, but this
first error path was accidentally overlooked.  It leads to a Smatch
warning:

    drivers/platform/chrome/cros_ec_lpc.c:181 ec_response_timed_out()
    error: uninitialized symbol 'data'.

Fix this by returning the error code instead of success.

Fixes: 68dbac0a58ef ("platform/chrome: cros_ec_lpc: MEC access can return error code")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/platform/chrome/cros_ec_lpc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index ebe9fb143840..f0470248b109 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -139,7 +139,7 @@ static int cros_ec_lpc_mec_read_bytes(unsigned int offset, unsigned int length,
 	int in_range = cros_ec_lpc_mec_in_range(offset, length);
 
 	if (in_range < 0)
-		return 0;
+		return in_range;
 
 	return in_range ?
 		cros_ec_lpc_io_bytes_mec(MEC_IO_READ,
@@ -158,7 +158,7 @@ static int cros_ec_lpc_mec_write_bytes(unsigned int offset, unsigned int length,
 	int in_range = cros_ec_lpc_mec_in_range(offset, length);
 
 	if (in_range < 0)
-		return 0;
+		return in_range;
 
 	return in_range ?
 		cros_ec_lpc_io_bytes_mec(MEC_IO_WRITE,
-- 
2.43.0