linux-kernel - [PATCH v2 13/33] mtd: rawnand: fsl_elbc: Let .probe retry if local bus is missing

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Message-ID:  <41a042207ef791c4c5bcb46f09f63c40c6aa321b.1705944943.git.u.kleine-koenig@pengutronix.de>
Date: Mon, 22 Jan 2024 19:07:08 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Mark Brown <broonie@...nel.org>
Cc: kernel@...gutronix.de,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Heiko Stuebner <heiko@...ech.de>,
	Pali Rohár <pali@...nel.org>,
	linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-spi@...r.kernel.org
Subject: [PATCH v2 13/33] mtd: rawnand: fsl_elbc: Let .probe retry if local bus is missing

If during probe fsl_lbc_ctrl_dev is NULL that might just be because the
fsl_lbc driver didn't bind yet. So return -EPROBE_DEFER in this case to
make the driver core retry probing later.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/mtd/nand/raw/fsl_elbc_nand.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/fsl_elbc_nand.c b/drivers/mtd/nand/raw/fsl_elbc_nand.c
index 1e3a80f06f33..df6a0d5c86bb 100644
--- a/drivers/mtd/nand/raw/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_elbc_nand.c
@@ -869,7 +869,8 @@ static int fsl_elbc_nand_probe(struct platform_device *pdev)
 	struct mtd_info *mtd;
 
 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
-		return -ENODEV;
+		return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "lbc_ctrl_dev missing\n");
+
 	lbc = fsl_lbc_ctrl_dev->regs;
 	dev = fsl_lbc_ctrl_dev->dev;
 
-- 
2.43.0