openwrt/target/linux/ipq806x/patches-5.15/130-mtd-nand-raw-qcom_nandc-handle-ret-from-parse-with-c.patch

From 99d897e04c0856188e371e60b00e13106cd44a24 Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Fri, 21 Oct 2022 18:38:21 +0200
Subject: [PATCH] mtd: nand: raw: qcom_nandc: handle ret from parse with
 codeword_fixup

With use_codeword_fixup enabled, any return from
mtd_device_parse_register gets overwritten. Aside from the clear bug, this
is also problematic as a parser can EPROBE_DEFER and because this is not
correctly handled, the nand is never rescanned later in the bootup
process.

An example of this problem is when smem requires additional time to be
probed and nandc use qcomsmempart as parser. Parser will return
EPROBE_DEFER but in the current code this ret gets overwritten by
qcom_nand_host_parse_boot_partitions and qcom_nand_host_init_and_register
return 0.

Correctly handle the return code from mtd_device_parse_register so that
any error from this function is not ignored.

Fixes: 862bdedd7f4b ("mtd: nand: raw: qcom_nandc: add support for unprotected spare data pages")
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/mtd/nand/raw/qcom_nandc.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -3157,16 +3157,18 @@ static int qcom_nand_host_init_and_regis
 
 	ret = mtd_device_parse_register(mtd, probes, NULL, NULL, 0);
 	if (ret)
-		nand_cleanup(chip);
+		goto err;
 
 	if (nandc->props->use_codeword_fixup) {
 		ret = qcom_nand_host_parse_boot_partitions(nandc, host, dn);
-		if (ret) {
-			nand_cleanup(chip);
-			return ret;
-		}
+		if (ret)
+			goto err;
 	}
 
+	return 0;
+
+err:
+	nand_cleanup(chip);
 	return ret;
 }