[PATCH v2 039/101] fbdev/imxfb: Duplicate video-mode option string

[Thomas Zimmermann]

Assume that the driver does not own the option string or its substrings
and hence duplicate the option string for the video mode. Allocate the
copy's memory with devm_kstrdup(), as the driver parses the option string
once per probed device. Linux will automatically free the memory upon
releasing the device.

Done in preparation of switching the driver to struct option_iter and
constifying the option string.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/video/fbdev/imxfb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
index 51fde1b2a793..aad7d447385c 100644
--- a/drivers/video/fbdev/imxfb.c
+++ b/drivers/video/fbdev/imxfb.c
@@ -843,7 +843,7 @@ static struct lcd_ops imxfb_lcd_ops = {
 	.set_power	= imxfb_lcd_set_power,
 };
 
-static int imxfb_setup(void)
+static int imxfb_setup(struct platform_device *pdev)
 {
 	char *opt, *options = NULL;
 
@@ -856,8 +856,8 @@ static int imxfb_setup(void)
 	while ((opt = strsep(&options, ",")) != NULL) {
 		if (!*opt)
 			continue;
-		else
-			fb_mode = opt;
+
+		fb_mode = devm_kstrdup(&pdev->dev, opt, GFP_KERNEL); // ignore errors
 	}
 
 	return 0;
@@ -877,7 +877,7 @@ static int imxfb_probe(struct platform_device *pdev)
 
 	dev_info(&pdev->dev, "i.MX Framebuffer driver\n");
 
-	ret = imxfb_setup();
+	ret = imxfb_setup(pdev);
 	if (ret < 0)
 		return ret;
 
-- 
2.39.2