linux-kernel - [PATCH 5.3 120/197] ACPI: NFIT: Fix unlock on error in scrub

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Message-Id: <20191027203358.213846715@linuxfoundation.org>
Date:   Sun, 27 Oct 2019 22:00:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 5.3 120/197] ACPI: NFIT: Fix unlock on error in scrub_show()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit edffc70f505abdab885f4b4212438b4298dec78f upstream.

We change the locking in this function and forgot to update this error
path so we are accidentally still holding the "dev->lockdep_mutex".

Fixes: 87a30e1f05d7 ("driver-core, libnvdimm: Let device subsystems add local lockdep coverage")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Ira Weiny <ira.weiny@...el.com>
Acked-by: Dan Williams <dan.j.williams@...el.com>
Cc: 5.3+ <stable@...r.kernel.org> # 5.3+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/acpi/nfit/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1322,7 +1322,7 @@ static ssize_t scrub_show(struct device
 	nfit_device_lock(dev);
 	nd_desc = dev_get_drvdata(dev);
 	if (!nd_desc) {
-		device_unlock(dev);
+		nfit_device_unlock(dev);
 		return rc;
 	}
 	acpi_desc = to_acpi_desc(nd_desc);