From: Dmitry Osipenko <digetx@gmail.com>
Date: Wed, 18 Dec 2019 21:23:04 +0300
Subject: soc/tegra: fuse: Unmap registers once they are not needed anymore
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Git-commit: 02676345e9b31ad8907af3755960e3cfef575f8d
Patch-mainline: v5.6-rc1
References: jsc#SLE-15847

Both Chip ID and strapping registers are now read out during of APB MISC
initialization, the registers' mapping isn't needed anymore once registers
are read. Hence let's unmap registers once they are not needed anymore,
for consistency.

Suggested-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 drivers/soc/tegra/fuse/tegra-apbmisc.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
index 6259390f68f4..4a737f15e401 100644
--- a/drivers/soc/tegra/fuse/tegra-apbmisc.c
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -158,16 +158,20 @@ void __init tegra_init_apbmisc(void)
 	}
 
 	apbmisc_base = ioremap_nocache(apbmisc.start, resource_size(&apbmisc));
-	if (!apbmisc_base)
+	if (!apbmisc_base) {
 		pr_err("failed to map APBMISC registers\n");
-	else
+	} else {
 		chipid = readl_relaxed(apbmisc_base + 4);
+		iounmap(apbmisc_base);
+	}
 
 	strapping_base = ioremap_nocache(straps.start, resource_size(&straps));
-	if (!strapping_base)
+	if (!strapping_base) {
 		pr_err("failed to map strapping options registers\n");
-	else
+	} else {
 		strapping = readl_relaxed(strapping_base);
+		iounmap(strapping_base);
+	}
 
 	long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code");
 }
-- 
2.26.2