linux-kernel - [PATCH v4 36/47] soc: fsl: qe: make cpm_muram

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Message-Id: <20191108130123.6839-37-linux@rasmusvillemoes.dk>
Date:   Fri,  8 Nov 2019 14:01:12 +0100
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
        Christophe Leroy <christophe.leroy@....fr>
Cc:     linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Scott Wood <oss@...error.net>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH v4 36/47] soc: fsl: qe: make cpm_muram_free() ignore a negative offset

This allows one to simplify callers since they can store a negative
value as a sentinel to indicate "this was never allocated" (or store
the -ENOMEM from an allocation failure) and then call cpm_muram_free()
unconditionally.

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 drivers/soc/fsl/qe/qe_common.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/soc/fsl/qe/qe_common.c b/drivers/soc/fsl/qe/qe_common.c
index ea9bef1d2c77..4437f4e14d2c 100644
--- a/drivers/soc/fsl/qe/qe_common.c
+++ b/drivers/soc/fsl/qe/qe_common.c
@@ -176,6 +176,9 @@ void cpm_muram_free(s32 offset)
 	int size;
 	struct muram_block *tmp;
 
+	if (offset < 0)
+		return;
+
 	size = 0;
 	spin_lock_irqsave(&cpm_muram_lock, flags);
 	list_for_each_entry(tmp, &muram_block_list, head) {
-- 
2.23.0