From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 5.2 083/171] i2c: stm32f7: fix the get_irq error cases Date: Thu, 18 Jul 2019 23:55:14 -0400 Message-ID: <20190719035643.14300-83-sashal@kernel.org> References: <20190719035643.14300-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190719035643.14300-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Fabrice Gasnier , Pierre-Yves MORDRET , Fabien Dessenne , Wolfram Sang , Sasha Levin , linux-i2c@vger.kernel.org List-Id: linux-i2c@vger.kernel.org From: Fabrice Gasnier [ Upstream commit 79b4499524ed659fb76323efc30f3dc03967c88f ] During probe, return the "get_irq" error value instead of -EINVAL which allows the driver to be deferred probed if needed. Fix also the case where of_irq_get() returns a negative value. Note : On failure of_irq_get() returns 0 or a negative value while platform_get_irq() returns a negative value. Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver") Reviewed-by: Pierre-Yves MORDRET Signed-off-by: Fabien Dessenne Signed-off-by: Fabrice Gasnier Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 48337bef5b87..3d90c0bb049e 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -25,7 +25,6 @@ #include #include #include -#include #include #include #include @@ -1816,15 +1815,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = { static int stm32f7_i2c_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; struct stm32f7_i2c_dev *i2c_dev; const struct stm32f7_i2c_setup *setup; struct resource *res; - u32 irq_error, irq_event, clk_rate, rise_time, fall_time; + u32 clk_rate, rise_time, fall_time; struct i2c_adapter *adap; struct reset_control *rst; dma_addr_t phy_addr; - int ret; + int irq_error, irq_event, ret; i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL); if (!i2c_dev) @@ -1836,16 +1834,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev) return PTR_ERR(i2c_dev->base); phy_addr = (dma_addr_t)res->start; - irq_event = irq_of_parse_and_map(np, 0); - if (!irq_event) { - dev_err(&pdev->dev, "IRQ event missing or invalid\n"); - return -EINVAL; + irq_event = platform_get_irq(pdev, 0); + if (irq_event <= 0) { + if (irq_event != -EPROBE_DEFER) + dev_err(&pdev->dev, "Failed to get IRQ event: %d\n", + irq_event); + return irq_event ? : -ENOENT; } - irq_error = irq_of_parse_and_map(np, 1); - if (!irq_error) { - dev_err(&pdev->dev, "IRQ error missing or invalid\n"); - return -EINVAL; + irq_error = platform_get_irq(pdev, 1); + if (irq_error <= 0) { + if (irq_error != -EPROBE_DEFER) + dev_err(&pdev->dev, "Failed to get IRQ error: %d\n", + irq_error); + return irq_error ? : -ENOENT; } i2c_dev->clk = devm_clk_get(&pdev->dev, NULL); -- 2.20.1