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From:   Li Qiong <liqiong@nfschina.com>
To:     Qiang Zhao <qiang.zhao@nxp.com>, Li Yang <leoyang.li@nxp.com>
Cc:     linuxppc-dev@lists.ozlabs.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        yuzhe@nfschina.com, renyu@nfschina.com,
        Li Qiong <liqiong@nfschina.com>
Subject: [PATCH] soc: fsl: qe: Check of ioremap return value in qe_reset
Date:   Sat, 11 Jun 2022 19:49:45 +0800
Message-Id: <20220611114945.24045-1-liqiong@nfschina.com>
Precedence: bulk

As the possible failure of the ioremap(), the qe_immr could be NULL.
Therefore it should be better to check it and print error message.

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

diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c
index b3c226eb5292..3c0948c2440e 100644
--- a/drivers/soc/fsl/qe/qe.c
+++ b/drivers/soc/fsl/qe/qe.c
@@ -88,6 +88,11 @@ void qe_reset(void)
 	if (qe_immr == NULL)
 		qe_immr = ioremap(get_qe_base(), QE_IMMAP_SIZE);
 
+	if (!qe_immr) {
+		pr_err("%s: failed to ioremap()\n", __func__);
+		return;
+	}
+
 	qe_snums_init();
 
 	qe_issue_cmd(QE_RESET, QE_CR_SUBBLOCK_INVALID,
-- 
2.11.0