linux-kernel - [PATCH] mtd: spi-nor: cqspi: fix error return code in cqspi

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Message-ID: <20170809162204.GA370@embeddedgus>
Date:   Wed, 9 Aug 2017 11:22:04 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        Marek Vasut <marek.vasut@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Richard Weinberger <richard@....at>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] mtd: spi-nor: cqspi: fix error return code in cqspi_probe()

platform_get_irq() returns an error code, but the cadence-quadspi
driver ignores it and always returns -ENXIO. This is not correct
and, prevents -EPROBE_DEFER from being propagated properly.

Print and propagate the return value of platform_get_irq on failure.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/mtd/spi-nor/cadence-quadspi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c
index 53c7d8e..15dacf5 100644
--- a/drivers/mtd/spi-nor/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/cadence-quadspi.c
@@ -1202,8 +1202,8 @@ static int cqspi_probe(struct platform_device *pdev)
 	/* Obtain IRQ line. */
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
-		dev_err(dev, "Cannot obtain IRQ.\n");
-		return -ENXIO;
+		dev_err(dev, "Cannot obtain IRQ: %d\n", irq);
+		return irq;
 	}
 
 	ret = clk_prepare_enable(cqspi->clk);
-- 
2.5.0