Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Li Qiong <liqiong@nfschina.com>
To:     Sergey Shtylyov <s.shtylyov@omp.ru>,
        Damien Le Moal <damien.lemoal@opensource.wdc.com>
Cc:     linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org,
        hukun@nfschina.com, qixu@nfschina.com, yuzhe@nfschina.com,
        renyu@nfschina.com, Li Qiong <liqiong@nfschina.com>
Subject: [PATCH] ata: handle failure of devm_ioremap()
Date:   Sun, 12 Jun 2022 15:32:22 +0800
Message-Id: <20220612073222.18974-1-liqiong@nfschina.com>
Precedence: bulk

As the possible failure of the devm_ioremap(), the return value
could be NULL. Therefore it should be better to check it and
print error message, return '-ENOMEM' error code.

Signed-off-by: Li Qiong <liqiong@nfschina.com>
---
 drivers/ata/pata_pxa.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
index 985f42c4fd70..cd1a8f37f920 100644
--- a/drivers/ata/pata_pxa.c
+++ b/drivers/ata/pata_pxa.c
@@ -228,6 +228,11 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	ap->ioaddr.bmdma_addr	= devm_ioremap(&pdev->dev, dma_res->start,
 						resource_size(dma_res));
 
+	if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr || !ap->ioaddr.bmdma_addr) {
+		dev_err(&pdev->dev, "failed to map ap->ioaddr\n");
+		return -ENOMEM;
+	}
+
 	/*
 	 * Adjust register offsets
 	 */
-- 
2.11.0