add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/video/fbdev/tgafb.c
..
..
@@ -166,6 +166,9 @@
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 {
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 	struct tga_par *par = (struct tga_par *)info->par;
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+	if (!var->pixclock)
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+		return -EINVAL;
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+
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 	if (par->tga_type == TGA_TYPE_8PLANE) {
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 		if (var->bits_per_pixel != 8)
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 			return -EINVAL;