linux-kernel - [PATCH] uio: pruss: fix to check return value of platform_get_irq() in pruss

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Date:   Sat, 22 Jul 2023 23:29:51 +0800
From:   Zhang Shurong <zhang_shurong@...mail.com>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org,
        Zhang Shurong <zhang_shurong@...mail.com>
Subject: [PATCH] uio: pruss: fix to check return value of platform_get_irq() in pruss_probe()

The platform_get_irq might be failed and return a negative result. So
there should have an error handling code.

Fixed this by adding an error handling code.

Fixes: f1a304e7941c ("UIO: add PRUSS UIO driver support")
Signed-off-by: Zhang Shurong <zhang_shurong@...mail.com>
---
 drivers/uio/uio_pruss.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c
index 83966dbd3bbf..122c38e2fbbd 100644
--- a/drivers/uio/uio_pruss.c
+++ b/drivers/uio/uio_pruss.c
@@ -175,8 +175,12 @@ static int pruss_probe(struct platform_device *pdev)
 		goto err_free_ddr_vaddr;
 	}
 
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		goto err_free_ddr_vaddr;
+
+	gdev->hostirq_start = ret;
 	gdev->pintc_base = pdata->pintc_base;
-	gdev->hostirq_start = platform_get_irq(pdev, 0);
 
 	for (cnt = 0, p = gdev->info; cnt < MAX_PRUSS_EVT; cnt++, p++) {
 		p->mem[0].addr = regs_prussio->start;
-- 
2.41.0