linux-kernel - [PATCH v2 7/8] staging: r8188eu: check firmware header existence before access

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Date:   Thu, 14 Apr 2022 12:43:22 +0200
From:   Michael Straube <straube.linux@...il.com>
To:     gregkh@...uxfoundation.org
Cc:     Larry.Finger@...inger.net, phil@...lpotter.co.uk,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Michael Straube <straube.linux@...il.com>
Subject: [PATCH v2 7/8] staging: r8188eu: check firmware header existence before access

We should access the fields of fwhdr only if the check for firmware
header existence is true. Move the affected code into the if block
that checks firmware header existence.

Signed-off-by: Michael Straube <straube.linux@...il.com>
---
 drivers/staging/r8188eu/core/rtw_fw.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_fw.c b/drivers/staging/r8188eu/core/rtw_fw.c
index 64963507a346..c58bce1a1856 100644
--- a/drivers/staging/r8188eu/core/rtw_fw.c
+++ b/drivers/staging/r8188eu/core/rtw_fw.c
@@ -249,14 +249,13 @@ int rtl8188e_firmware_download(struct adapter *padapter)
 	fw_data = dvobj->firmware.data;
 	fw_size = dvobj->firmware.size;
 
-	/*  To Check Fw header. Added by tynli. 2009.12.04. */
 	fwhdr = (struct rt_firmware_hdr *)dvobj->firmware.data;
 
-	pr_info("%sFirmware Version %d, SubVersion %d, Signature 0x%x\n",
-		DRIVER_PREFIX, le16_to_cpu(fwhdr->version), fwhdr->subversion,
-		le16_to_cpu(fwhdr->signature));
-
 	if (IS_FW_HEADER_EXIST(fwhdr)) {
+		pr_info("%sFirmware Version %d, SubVersion %d, Signature 0x%x\n",
+			DRIVER_PREFIX, le16_to_cpu(fwhdr->version), fwhdr->subversion,
+			le16_to_cpu(fwhdr->signature));
+
 		fw_data = fw_data + sizeof(struct rt_firmware_hdr);
 		fw_size = fw_size - sizeof(struct rt_firmware_hdr);
 	}
-- 
2.35.1