From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabrice Gasnier Subject: [PATCH v3] i2c: i2c-stm32f7: fix the get_irq error cases Date: Mon, 17 Jun 2019 09:53:01 +0200 Message-ID: <1560757981-10532-1-git-send-email-fabrice.gasnier@st.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: wsa@the-dreams.de, pierre-yves.mordret@st.com Cc: alexandre.torgue@st.com, marc.w.gonzalez@free.fr, linux-kernel@vger.kernel.org, fabien.dessenne@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org List-Id: linux-i2c@vger.kernel.org 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 --- Changes in v3: - return -ENOENT instead of -ENODEV and shorten the ternary operator as suggested by Wolfram. Changes in v2: - Also check for irq == 0 that means "does not exist" as pointed out by Marc --- 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 4284fc9..432b701 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 @@ -1812,15 +1811,14 @@ 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) @@ -1832,16 +1830,20 @@ 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); -- 2.7.4