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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Jiasheng Jiang <jiasheng@iscas.ac.cn>,
        Oded Gabbay <ogabbay@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.16 0670/1017] habanalabs: Add check for pci_enable_device
Date:   Tue,  5 Apr 2022 09:26:23 +0200
Message-Id: <20220405070414.169016092@linuxfoundation.org>
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From: Jiasheng Jiang <jiasheng@iscas.ac.cn>

[ Upstream commit 9c27896ac1bb83ea5c461ce6f7089d02102a2b21 ]

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@iscas.ac.cn>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 1f2a3dc6c4e2..78a6789ef7cc 100644
--- a/drivers/misc/habanalabs/common/debugfs.c
+++ b/drivers/misc/habanalabs/common/debugfs.c
@@ -856,6 +856,8 @@ 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);
-- 
2.34.1