linux-kernel - [PATCH 5.10 151/530] mtd: rawnand: qcom: Return actual error code instead of -ENODEV

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Date:   Wed, 12 May 2021 16:44:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 151/530] mtd: rawnand: qcom: Return actual error code instead of -ENODEV

From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

[ Upstream commit 55fbb9ba4f06cb6aff32daca1e1910173c13ec51 ]

In qcom_probe_nand_devices() function, the error code returned by
qcom_nand_host_init_and_register() is converted to -ENODEV in the case
of failure. This poses issue if -EPROBE_DEFER is returned when the
dependency is not available for a component like parser.

So let's restructure the error handling logic a bit and return the
actual error code in case of qcom_nand_host_init_and_register() failure.

Fixes: c76b78d8ec05 ("mtd: nand: Qualcomm NAND controller driver")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mtd/nand/raw/qcom_nandc.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index dfc17a28a06b..b99d2e9d1e2c 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2874,7 +2874,7 @@ static int qcom_probe_nand_devices(struct qcom_nand_controller *nandc)
 	struct device *dev = nandc->dev;
 	struct device_node *dn = dev->of_node, *child;
 	struct qcom_nand_host *host;
-	int ret;
+	int ret = -ENODEV;
 
 	for_each_available_child_of_node(dn, child) {
 		host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
@@ -2892,10 +2892,7 @@ static int qcom_probe_nand_devices(struct qcom_nand_controller *nandc)
 		list_add_tail(&host->node, &nandc->host_list);
 	}
 
-	if (list_empty(&nandc->host_list))
-		return -ENODEV;
-
-	return 0;
+	return ret;
 }
 
 /* parse custom DT properties here */
-- 
2.30.2