linux-kernel - [PATCH 2/2] mtd: rawnand: qcom: Return actual error code instead of -ENODEV

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Message-Id: <20210302132757.225395-3-manivannan.sadhasivam@linaro.org>
Date:   Tue,  2 Mar 2021 18:57:57 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     miquel.raynal@...tlin.com, richard@....at, vigneshr@...com
Cc:     linux-arm-msm@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, boris.brezillon@...labora.com,
        Daniele.Palmas@...it.com, bjorn.andersson@...aro.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 2/2] mtd: rawnand: qcom: Return actual error code instead of -ENODEV

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>
---
 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 c2dc99c1b2f1..54230f2c1a3f 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2952,7 +2952,7 @@ 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);
@@ -2970,10 +2970,7 @@ 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 */
-- 
2.25.1