linux-kernel - [PATCH v1 2/2] firmware: meson-sm: unmap out

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Date:   Wed, 8 Nov 2023 15:56:04 +0300
From:   Evgeny Bachinin <EABachinin@...utedevices.com>
To:     Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Evgeny Bachinin <EABachinin@...utedevices.com>,
        Dmitry Rokosov <ddrokosov@...rdevices.ru>,
        Miles Chen <miles.chen@...iatek.com>,
        Alexey Romanov <avromanov@...utedevices.com>
CC:     <kernel@...rdevices.ru>, <evgen89bachinin@...il.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-amlogic@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 2/2] firmware: meson-sm: unmap out_base shmem in error path

When SM driver was introduced in [1], the code flow did not require
to unmap out_base shmem in case of errors inside probe().
During [2], the additional error path appeared, which requires unmap.

Patch adds iounmap() missed.

Links:
[1] https://lore.kernel.org/linux-amlogic/1466339944-602-2-git-send-email-carlo@caione.org/
[2] https://lore.kernel.org/linux-amlogic/1532613556-5398-1-git-send-email-narmstrong@baylibre.com/

Fixes: 0789724f86a5 ("firmware: meson_sm: Add serial number sysfs entry")
Signed-off-by: Evgeny Bachinin <EABachinin@...utedevices.com>
---
 drivers/firmware/meson/meson_sm.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/meson/meson_sm.c b/drivers/firmware/meson/meson_sm.c
index 73878ff9833c..ca5f3534eddd 100644
--- a/drivers/firmware/meson/meson_sm.c
+++ b/drivers/firmware/meson/meson_sm.c
@@ -307,7 +307,7 @@ static int __init meson_sm_probe(struct platform_device *pdev)
 		fw->sm_shmem_out_base = meson_sm_map_shmem(chip->cmd_shmem_out_base,
 							   chip->shmem_size);
 		if (WARN_ON(!fw->sm_shmem_out_base))
-			goto out_in_base;
+			goto unmap_in_base;
 	}
 
 	fw->chip = chip;
@@ -315,13 +315,15 @@ static int __init meson_sm_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, fw);
 
 	if (devm_of_platform_populate(dev))
-		goto out_in_base;
+		goto unmap_out_base;
 
 	pr_info("secure-monitor enabled\n");
 
 	return 0;
 
-out_in_base:
+unmap_out_base:
+	iounmap(fw->sm_shmem_out_base);
+unmap_in_base:
 	iounmap(fw->sm_shmem_in_base);
 out:
 	return -EINVAL;
-- 
2.34.1