linux-kernel - [PATCH 5.2 53/61] staging: vchiq_2835_arm: revert "quit using custom down

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Message-Id: <20190712121623.580255307@linuxfoundation.org>
Date:   Fri, 12 Jul 2019 14:20:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Stefan Wahren <stefan.wahren@...e.com>
Subject: [PATCH 5.2 53/61] staging: vchiq_2835_arm: revert "quit using custom down_interruptible()"

From: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>

commit 061ca1401f96c254e7f179bf97a1fc5c7f47e1e1 upstream.

The killable version of down() is meant to be used on situations where
it should not fail at all costs, but still have the convenience of being
able to kill it if really necessary. VCHIQ doesn't fit this criteria, as
it's mainly used as an interface to V4L2 and ALSA devices.

Fixes: ff5979ad8636 ("staging: vchiq_2835_arm: quit using custom down_interruptible()")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Acked-by: Stefan Wahren <stefan.wahren@...e.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
@@ -523,7 +523,7 @@ create_pagelist(char __user *buf, size_t
 		(g_cache_line_size - 1)))) {
 		char *fragments;
 
-		if (down_killable(&g_free_fragments_sema)) {
+		if (down_interruptible(&g_free_fragments_sema) != 0) {
 			cleanup_pagelistinfo(pagelistinfo);
 			return NULL;
 		}