From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: rjw@rjwysocki.net, lenb@kernel.org
Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: [PATCH] ACPI/CPC: Don't try to clean up uninitialized CPC data
Date: Fri, 16 Dec 2016 13:35:46 -0500 [thread overview]
Message-ID: <1481913346-16321-1-git-send-email-boris.ostrovsky@oracle.com> (raw)
If acpi_cppc_processor_probe() had not executed successfully (for
example, if _CPC object was not found) then cpc_desc_ptr for that
processor will be invalid.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
drivers/acpi/cppc_acpi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index d0d0504..5bba26e 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -824,6 +824,8 @@ void acpi_cppc_processor_exit(struct acpi_processor *pr)
void __iomem *addr;
cpc_ptr = per_cpu(cpc_desc_ptr, pr->id);
+ if (!cpc_ptr)
+ return;
/* Free all the mapped sys mem areas for this CPU */
for (i = 2; i < cpc_ptr->num_entries; i++) {
--
1.8.3.1
next reply other threads:[~2016-12-16 18:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-16 18:35 Boris Ostrovsky [this message]
2016-12-16 21:52 ` Prakash, Prashanth
2016-12-16 22:02 ` Boris Ostrovsky
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