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Date:   Tue, 23 Oct 2018 14:28:52 +0300
From:   Dan Carpenter <dan.carpenter@oracle.com>
To:     kbuild@01.org, Salil Mehta <salil.mehta@huawei.com>
Cc:     kbuild-all@01.org, davem@davemloft.net, salil.mehta@huawei.com,
        yisen.zhuang@huawei.com, lipeng321@huawei.com,
        mehta.salil@opnsrc.net, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, linuxarm@huawei.com,
        Shiju Jose <shiju.jose@huawei.com>
Subject: Re: [PATCH net-next 6/7] net: hns3: Add enable and process hw errors
 from PPP
Message-ID: <20181023112852.4pmcezetrudduvna@mwanda>
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Sender: linux-kernel-owner@vger.kernel.org
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Hi Shiju,

Thank you for the patch! Perhaps something to improve:

url:    https://github.com/0day-ci/linux/commits/Salil-Mehta/Adds-support-of-RAS-Error-Handling-in-HNS3-Driver/20181021-183911

smatch warnings:
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c:700 hclge_log_and_clear_ppp_error() error: uninitialized symbol 'hw_err_lst3'.

# https://github.com/0day-ci/linux/commit/9a8545e85954ec55367e8881d18cc2ae95c56d98
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout 9a8545e85954ec55367e8881d18cc2ae95c56d98
vim +/hw_err_lst3 +700 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c

19049622e Shiju Jose 2018-10-19  653  
9a8545e85 Shiju Jose 2018-10-19  654  static int hclge_log_and_clear_ppp_error(struct hclge_dev *hdev, u32 cmd,
9a8545e85 Shiju Jose 2018-10-19  655  					 enum hclge_err_int_type int_type)
9a8545e85 Shiju Jose 2018-10-19  656  {
9a8545e85 Shiju Jose 2018-10-19  657  	enum hnae3_reset_type reset_level = HNAE3_NONE_RESET;
9a8545e85 Shiju Jose 2018-10-19  658  	struct device *dev = &hdev->pdev->dev;
9a8545e85 Shiju Jose 2018-10-19  659  	const struct hclge_hw_error *hw_err_lst1, *hw_err_lst2, *hw_err_lst3;
9a8545e85 Shiju Jose 2018-10-19  660  	struct hclge_desc desc[2];
9a8545e85 Shiju Jose 2018-10-19  661  	u32 err_sts;
9a8545e85 Shiju Jose 2018-10-19  662  	int ret;
9a8545e85 Shiju Jose 2018-10-19  663  
9a8545e85 Shiju Jose 2018-10-19  664  	/* read PPP INT sts */
9a8545e85 Shiju Jose 2018-10-19  665  	ret = hclge_cmd_query_error(hdev, &desc[0], cmd,
9a8545e85 Shiju Jose 2018-10-19  666  				    HCLGE_CMD_FLAG_NEXT, 5, int_type);
9a8545e85 Shiju Jose 2018-10-19  667  	if (ret) {
9a8545e85 Shiju Jose 2018-10-19  668  		dev_err(dev, "failed(=%d) to query PPP interrupt status\n",
9a8545e85 Shiju Jose 2018-10-19  669  			ret);
9a8545e85 Shiju Jose 2018-10-19  670  		return -EIO;
9a8545e85 Shiju Jose 2018-10-19  671  	}
9a8545e85 Shiju Jose 2018-10-19  672  
9a8545e85 Shiju Jose 2018-10-19  673  	/* log error */
9a8545e85 Shiju Jose 2018-10-19  674  	if (cmd == HCLGE_PPP_CMD0_INT_CMD) {
9a8545e85 Shiju Jose 2018-10-19  675  		hw_err_lst1 = &hclge_ppp_mpf_int0[0];
9a8545e85 Shiju Jose 2018-10-19  676  		hw_err_lst2 = &hclge_ppp_mpf_int1[0];
9a8545e85 Shiju Jose 2018-10-19  677  		hw_err_lst3 = &hclge_ppp_pf_int[0];
9a8545e85 Shiju Jose 2018-10-19  678  	} else if (cmd == HCLGE_PPP_CMD1_INT_CMD) {
9a8545e85 Shiju Jose 2018-10-19  679  		hw_err_lst1 = &hclge_ppp_mpf_int2[0];
9a8545e85 Shiju Jose 2018-10-19  680  		hw_err_lst2 = &hclge_ppp_mpf_int3[0];

Not set here.

9a8545e85 Shiju Jose 2018-10-19  681  	} else {
9a8545e85 Shiju Jose 2018-10-19  682  		dev_err(dev, "invalid command(=%d)\n", cmd);
9a8545e85 Shiju Jose 2018-10-19  683  		return -EINVAL;
9a8545e85 Shiju Jose 2018-10-19  684  	}
9a8545e85 Shiju Jose 2018-10-19  685  
9a8545e85 Shiju Jose 2018-10-19  686  	err_sts = le32_to_cpu(desc[0].data[2]);
9a8545e85 Shiju Jose 2018-10-19  687  	if (err_sts) {
9a8545e85 Shiju Jose 2018-10-19  688  		hclge_log_error(dev, hw_err_lst1, err_sts);
9a8545e85 Shiju Jose 2018-10-19  689  		reset_level = HNAE3_FUNC_RESET;
9a8545e85 Shiju Jose 2018-10-19  690  	}
9a8545e85 Shiju Jose 2018-10-19  691  
9a8545e85 Shiju Jose 2018-10-19  692  	err_sts = le32_to_cpu(desc[0].data[3]);
9a8545e85 Shiju Jose 2018-10-19  693  	if (err_sts) {
9a8545e85 Shiju Jose 2018-10-19  694  		hclge_log_error(dev, hw_err_lst2, err_sts);
9a8545e85 Shiju Jose 2018-10-19  695  		reset_level = HNAE3_FUNC_RESET;
9a8545e85 Shiju Jose 2018-10-19  696  	}
9a8545e85 Shiju Jose 2018-10-19  697  
9a8545e85 Shiju Jose 2018-10-19  698  	err_sts = (le32_to_cpu(desc[0].data[4]) >> 8) & 0x3;
9a8545e85 Shiju Jose 2018-10-19  699  	if (err_sts) {
9a8545e85 Shiju Jose 2018-10-19 @700  		hclge_log_error(dev, hw_err_lst3, err_sts);
                                                                     ^^^^^^^^^^^
Uninitialized.

9a8545e85 Shiju Jose 2018-10-19  701  		reset_level = HNAE3_FUNC_RESET;
9a8545e85 Shiju Jose 2018-10-19  702  	}
9a8545e85 Shiju Jose 2018-10-19  703  
9a8545e85 Shiju Jose 2018-10-19  704  	/* clear PPP INT */
9a8545e85 Shiju Jose 2018-10-19  705  	ret = hclge_cmd_clear_error(hdev, &desc[0], NULL, 0,
9a8545e85 Shiju Jose 2018-10-19  706  				    HCLGE_CMD_FLAG_NEXT);
9a8545e85 Shiju Jose 2018-10-19  707  	if (ret) {
9a8545e85 Shiju Jose 2018-10-19  708  		dev_err(dev, "failed(=%d) to clear PPP interrupt status\n",
9a8545e85 Shiju Jose 2018-10-19  709  			ret);
9a8545e85 Shiju Jose 2018-10-19  710  		return -EIO;
9a8545e85 Shiju Jose 2018-10-19  711  	}
9a8545e85 Shiju Jose 2018-10-19  712  
9a8545e85 Shiju Jose 2018-10-19  713  	return 0;
9a8545e85 Shiju Jose 2018-10-19  714  }
9a8545e85 Shiju Jose 2018-10-19  715  

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