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From:   Miaoqian Lin <linmq006@gmail.com>
To:     Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Sowjanya Komatineni <skomatineni@nvidia.com>,
        Laxman Dewangan <ldewangan@nvidia.com>,
        Mark Brown <broonie@kernel.org>, linux-tegra@vger.kernel.org,
        linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     linmq006@gmail.com
Subject: [PATCH] spi: tegra210-quad: Fix missin IRQ check in tegra_qspi_probe
Date:   Fri, 28 Jan 2022 16:59:56 +0000
Message-Id: <20220128165956.27821-1-linmq006@gmail.com>
Precedence: bulk

This func misses checking for platform_get_irq()'s call and may passes the
negative error codes to request_threaded_irq(), which takes unsigned IRQ #,
causing it to fail with -EINVAL, overriding an original error code.
Stop calling request_threaded_irq() with invalid IRQ #s.

Fixes: 921fc1838fb0 ("spi: tegra210-quad: Add support for Tegra210 QSPI controller")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/spi/spi-tegra210-quad.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c
index ce1bdb4767ea..cb00ac2fc7d8 100644
--- a/drivers/spi/spi-tegra210-quad.c
+++ b/drivers/spi/spi-tegra210-quad.c
@@ -1240,6 +1240,8 @@ static int tegra_qspi_probe(struct platform_device *pdev)
 
 	tqspi->phys = r->start;
 	qspi_irq = platform_get_irq(pdev, 0);
+	if (qspi_irq < 0)
+		return qspi_irq;
 	tqspi->irq = qspi_irq;
 
 	tqspi->clk = devm_clk_get(&pdev->dev, "qspi");
-- 
2.17.1