From: Hoan Tran <hotran@apm.com>
Date: Fri, 14 Oct 2016 23:20:21 +0000 (-0700)
Subject: mailbox: PCC: Fix return value of pcc_mbox_request_channel()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d0679cfaf54c9e42e3ba4f8d5e67969932040d16;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

mailbox: PCC: Fix return value of pcc_mbox_request_channel()

When CONFIG_PCC is disabled, pcc_mbox_request_channel() needs to
return ERR_PTR(-ENODEV), not a NULL pointer, as the callers of
this function use IS_ERR() to check for error code.

Signed-off-by: Duc Dang <dhdang@apm.com>
Signed-off-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/include/acpi/pcc.h b/include/acpi/pcc.h
index 17a940a14477..8caa79c61703 100644
--- a/include/acpi/pcc.h
+++ b/include/acpi/pcc.h
@@ -21,7 +21,7 @@ extern void pcc_mbox_free_channel(struct mbox_chan *chan);
 static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
 							 int subspace_id)
 {
-	return NULL;
+	return ERR_PTR(-ENODEV);
 }
 static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
 #endif