linux-kernel - [PATCH] habanalabs: Add check for pci_enable

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Message-Id: <20220224065805.3305407-1-jiasheng@iscas.ac.cn>
Date:   Thu, 24 Feb 2022 14:58:05 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     ogabbay@...nel.org, arnd@...db.de, gregkh@...uxfoundation.org,
        ynudelman@...ana.ai, obitton@...ana.ai
Cc:     linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] habanalabs: Add check for pci_enable_device

As the potential failure of the pci_enable_device(),
it should be better to check the return value and return
error if fails.

Fixes: 70b2f993ea4a ("habanalabs: create common folder")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/misc/habanalabs/common/debugfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/habanalabs/common/debugfs.c b/drivers/misc/habanalabs/common/debugfs.c
index fc084ee5106e..09001fd9db85 100644
--- a/drivers/misc/habanalabs/common/debugfs.c
+++ b/drivers/misc/habanalabs/common/debugfs.c
@@ -890,6 +890,8 @@ static ssize_t hl_set_power_state(struct file *f, const char __user *buf,
 		pci_set_power_state(hdev->pdev, PCI_D0);
 		pci_restore_state(hdev->pdev);
 		rc = pci_enable_device(hdev->pdev);
+		if (rc < 0)
+			return rc;
 	} else if (value == 2) {
 		pci_save_state(hdev->pdev);
 		pci_disable_device(hdev->pdev);
-- 
2.25.1