From: Artem Lytkin <iprintercanon@gmail.com>
To: Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
Teddy Wang <teddy.wang@siliconmotion.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev,
linux-kernel@vger.kernel.org,
Artem Lytkin <iprintercanon@gmail.com>
Subject: [PATCH v3 2/5] staging: sm750fb: use strcmp() for exact option matching
Date: Wed, 4 Feb 2026 12:05:59 +0000 [thread overview]
Message-ID: <20260204120602.6715-2-iprintercanon@gmail.com> (raw)
In-Reply-To: <20260204120602.6715-1-iprintercanon@gmail.com>
Replace strncmp(opt, "...", strlen("...")) with strcmp() in option
parsing functions. Options from strsep() are complete null-terminated
tokens, so prefix matching via strncmp() could cause false positives
for options like "noaccelXYZ" matching "noaccel".
Fixes: 81dee67e215b ("staging: sm750fb: add sm750 to staging")
Signed-off-by: Artem Lytkin <iprintercanon@gmail.com>
---
drivers/staging/sm750fb/sm750.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
index 4c6e84c03..bd2d4a290 100644
--- a/drivers/staging/sm750fb/sm750.c
+++ b/drivers/staging/sm750fb/sm750.c
@@ -937,21 +937,21 @@ static void sm750fb_setup(struct sm750_dev *sm750_dev, char *src)
dev_info(&sm750_dev->pdev->dev, "opt=%s\n", opt);
dev_info(&sm750_dev->pdev->dev, "src=%s\n", src);
- if (!strncmp(opt, "swap", strlen("swap"))) {
+ if (!strcmp(opt, "swap")) {
swap = 1;
- } else if (!strncmp(opt, "nocrt", strlen("nocrt"))) {
+ } else if (!strcmp(opt, "nocrt")) {
sm750_dev->nocrt = 1;
- } else if (!strncmp(opt, "36bit", strlen("36bit"))) {
+ } else if (!strcmp(opt, "36bit")) {
sm750_dev->pnltype = sm750_doubleTFT;
- } else if (!strncmp(opt, "18bit", strlen("18bit"))) {
+ } else if (!strcmp(opt, "18bit")) {
sm750_dev->pnltype = sm750_dualTFT;
- } else if (!strncmp(opt, "24bit", strlen("24bit"))) {
+ } else if (!strcmp(opt, "24bit")) {
sm750_dev->pnltype = sm750_24TFT;
- } else if (!strncmp(opt, "nohwc0", strlen("nohwc0"))) {
+ } else if (!strcmp(opt, "nohwc0")) {
g_hwcursor &= ~0x1;
- } else if (!strncmp(opt, "nohwc1", strlen("nohwc1"))) {
+ } else if (!strcmp(opt, "nohwc1")) {
g_hwcursor &= ~0x2;
- } else if (!strncmp(opt, "nohwc", strlen("nohwc"))) {
+ } else if (!strcmp(opt, "nohwc")) {
g_hwcursor = 0;
} else {
if (!g_fbmode[0]) {
@@ -1156,11 +1156,11 @@ static int __init lynxfb_setup(char *options)
*/
while ((opt = strsep(&options, ":")) != NULL) {
/* options that mean for any lynx chips are configured here */
- if (!strncmp(opt, "noaccel", strlen("noaccel"))) {
+ if (!strcmp(opt, "noaccel")) {
g_noaccel = 1;
- } else if (!strncmp(opt, "nomtrr", strlen("nomtrr"))) {
+ } else if (!strcmp(opt, "nomtrr")) {
g_nomtrr = 1;
- } else if (!strncmp(opt, "dual", strlen("dual"))) {
+ } else if (!strcmp(opt, "dual")) {
g_dualview = 1;
} else {
memcpy(tmp, opt, strlen(opt));
--
2.43.0
next prev parent reply other threads:[~2026-02-04 12:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-04 12:05 [PATCH v3 1/5] staging: sm750fb: replace strcat() with memcpy() in lynxfb_setup() Artem Lytkin
2026-02-04 12:05 ` Artem Lytkin [this message]
2026-02-07 13:31 ` [PATCH v3 2/5] staging: sm750fb: use strcmp() for exact option matching Greg Kroah-Hartman
2026-02-04 12:06 ` [PATCH v3 3/5] staging: sm750fb: remove debug and diagnostic prints Artem Lytkin
2026-02-07 13:32 ` Greg Kroah-Hartman
2026-02-04 12:06 ` [PATCH v3 4/5] staging: sm750fb: convert logging to device-based in sm750.c Artem Lytkin
2026-02-04 12:06 ` [PATCH v3 5/5] staging: sm750fb: convert logging to device-based in sm750_hw.c Artem Lytkin
2026-02-07 13:27 ` [PATCH v3 1/5] staging: sm750fb: replace strcat() with memcpy() in lynxfb_setup() Greg Kroah-Hartman
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