linux-kernel - [RFT 08/16] memory: omap-gpmc: Use WARN() instead of BUG() on wrong free

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Date:   Fri, 24 Jul 2020 20:23:20 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Markus Mayer <mmayer@...adcom.com>,
        Roger Quadros <rogerq@...com>,
        Tony Lindgren <tony@...mide.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Kukjin Kim <kgene@...nel.org>,
        Lukasz Luba <lukasz.luba@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-pm@...r.kernel.org
Cc:     Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>
Subject: [RFT 08/16] memory: omap-gpmc: Use WARN() instead of BUG() on wrong free

Since driver tracks reserved memory, freeing a non-reserved GPMC should
not be fatal and crash the system.  Printing a warning is friendlier.

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

---

Not tested on HW.
---
 drivers/memory/omap-gpmc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index 9339a7c75fdd..414bfb481266 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -1072,8 +1072,7 @@ void gpmc_cs_free(int cs)
 
 	spin_lock(&gpmc_mem_lock);
 	if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) {
-		printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs);
-		BUG();
+		WARN(1, "Trying to free non-reserved GPMC CS%d\n", cs);
 		spin_unlock(&gpmc_mem_lock);
 		return;
 	}
-- 
2.17.1