linux-kernel - [PATCH 4/4] mtd: lpc32xx_slc: Make probe() return -EPROBE

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Message-Id: <1340812275-1197-4-git-send-email-stigge@antcom.de>
Date:	Wed, 27 Jun 2012 17:51:15 +0200
From:	Roland Stigge <stigge@...com.de>
To:	dedekind1@...il.com, linux-mtd@...ts.infradead.org,
	aletes.xgr@...il.com, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	dwmw2@...radead.org, kevin.wells@....com, srinivas.bakki@....com,
	linux-arm-kernel@...ts.infradead.org, hechtb@...glemail.com,
	lars@...afoo.de, b32955@...escale.com, leiwen@...vell.com,
	linux@....linux.org.uk
Cc:	Roland Stigge <stigge@...com.de>
Subject: [PATCH 4/4] mtd: lpc32xx_slc: Make probe() return -EPROBE_DEFER if necessary

Via of_get_named_gpio(), wp_gpio can become -EPROBE_DEFER which now makes
probe() return -EPROBE_DEFER as well to wait until the gpio controller is
probed before trying to probe lpc32xx_slc again.

Signed-off-by: Roland Stigge <stigge@...com.de>
Acked-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>
---
 drivers/mtd/nand/lpc32xx_slc.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c
index 4e8db3a..142a91d 100644
--- a/drivers/mtd/nand/lpc32xx_slc.c
+++ b/drivers/mtd/nand/lpc32xx_slc.c
@@ -821,6 +821,8 @@ static int __devinit lpc32xx_nand_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "Missing platform data\n");
 		return -ENOENT;
 	}
+	if (host->ncfg->wp_gpio == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
 	if (gpio_is_valid(host->ncfg->wp_gpio) &&
 			gpio_request(host->ncfg->wp_gpio, "NAND WP")) {
 		dev_err(&pdev->dev, "GPIO not available\n");
-- 
1.7.10.4

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