linux-kernel - [PATCH v2] mfd: intel-lpss: Fix IRQ check

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Message-Id: <20231101062643.507983-1-nichen@iscas.ac.cn>
Date:   Wed,  1 Nov 2023 06:26:43 +0000
From:   Chen Ni <nichen@...as.ac.cn>
To:     lee@...nel.org, andriy.shevchenko@...ux.intel.com,
        mika.westerberg@...ux.intel.com
Cc:     linux-kernel@...r.kernel.org, Chen Ni <nichen@...as.ac.cn>
Subject: [PATCH v2] mfd: intel-lpss: Fix IRQ check

platform_get_irq() returns a negative error code to indicating an
error. So in intel_lpss_probe() the unset / erroneous IRQ should be
returned as is.

Fixes: 4b45efe85263 ("mfd: Add support for Intel Sunrisepoint LPSS devices")
Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
Changelog:

v1 -> v2:
1. Update commit message
2. Fix IRQ check in intel_lpcc_probe()
---
 drivers/mfd/intel-lpss.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
index 9591b354072a..4c9d0222751a 100644
--- a/drivers/mfd/intel-lpss.c
+++ b/drivers/mfd/intel-lpss.c
@@ -378,9 +378,12 @@ int intel_lpss_probe(struct device *dev,
 	struct intel_lpss *lpss;
 	int ret;
 
-	if (!info || !info->mem || info->irq <= 0)
+	if (!info || !info->mem)
 		return -EINVAL;
 
+	if (info->irq < 0)
+		return info->irq;
+
 	lpss = devm_kzalloc(dev, sizeof(*lpss), GFP_KERNEL);
 	if (!lpss)
 		return -ENOMEM;
-- 
2.25.1