add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mtd/mtdblock.c
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@@ -153,7 +153,7 @@
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 				mtdblk->cache_state = STATE_EMPTY;
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 				ret = mtd_read(mtd, sect_start, sect_size,
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 					       &retlen, mtdblk->cache_data);
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-				if (ret)
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+				if (ret && !mtd_is_bitflip(ret))
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 					return ret;
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 				if (retlen != sect_size)
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 					return -EIO;
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@@ -188,8 +188,12 @@
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 	pr_debug("mtdblock: read on \"%s\" at 0x%lx, size 0x%x\n",
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 			mtd->name, pos, len);
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-	if (!sect_size)
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-		return mtd_read(mtd, pos, len, &retlen, buf);
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+	if (!sect_size) {
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+		ret = mtd_read(mtd, pos, len, &retlen, buf);
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+		if (ret && !mtd_is_bitflip(ret))
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+			return ret;
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+		return 0;
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+	}
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 	while (len > 0) {
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 		unsigned long sect_start = (pos/sect_size)*sect_size;
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@@ -209,7 +213,7 @@
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 			memcpy (buf, mtdblk->cache_data + offset, size);
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 		} else {
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 			ret = mtd_read(mtd, pos, size, &retlen, buf);
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-			if (ret)
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+			if (ret && !mtd_is_bitflip(ret))
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 				return ret;
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 			if (retlen != size)
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 				return -EIO;