linux-kernel - [PATCH] habanalabs: added return value check for hl_fw_dynamic_send_clear

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Date:   Wed, 16 Nov 2022 14:41:25 +0100
From:   Marco Pagani <marpagan@...hat.com>
To:     Oded Gabbay <ogabbay@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>
Cc:     Marco Pagani <marpagan@...hat.com>, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: [PATCH] habanalabs: added return value check for hl_fw_dynamic_send_clear_cmd()

The clang-analyzer reported a warning: "Value stored to 'rc' is never
read".

The return value check for the first hl_fw_dynamic_send_clear_cmd() call
in hl_fw_dynamic_send_protocol_cmd() appears to be missing.

Signed-off-by: Marco Pagani <marpagan@...hat.com>
---
 drivers/misc/habanalabs/common/firmware_if.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index 2de6a9bd564d..311942108dbc 100644
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -1782,6 +1782,8 @@ int hl_fw_dynamic_send_protocol_cmd(struct hl_device *hdev,
 
 	/* first send clear command to clean former commands */
 	rc = hl_fw_dynamic_send_clear_cmd(hdev, fw_loader);
+	if (rc)
+		return rc;
 
 	/* send the actual command */
 	hl_fw_dynamic_send_cmd(hdev, fw_loader, cmd, size);
-- 
2.38.1