linux-kernel - [PATCH 11/38] HSI: omap_ssi: fix handling ida_simple

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Message-id: <1442842450-29769-12-git-send-email-a.hajda@samsung.com>
Date:	Mon, 21 Sep 2015 15:33:43 +0200
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Sebastian Reichel <sre@...nel.org>
Subject: [PATCH 11/38] HSI: omap_ssi: fix handling ida_simple_get result

The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 drivers/hsi/controllers/omap_ssi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/hsi/controllers/omap_ssi.c b/drivers/hsi/controllers/omap_ssi.c
index 089c6c3..5d9225f 100644
--- a/drivers/hsi/controllers/omap_ssi.c
+++ b/drivers/hsi/controllers/omap_ssi.c
@@ -336,11 +336,10 @@ static int __init ssi_add_controller(struct hsi_controller *ssi,
 		return -ENOMEM;
 	}
 
-	ssi->id = ida_simple_get(&platform_omap_ssi_ida, 0, 0, GFP_KERNEL);
-	if (ssi->id < 0) {
-		err = ssi->id;
+	err = ida_simple_get(&platform_omap_ssi_ida, 0, 0, GFP_KERNEL);
+	if (err < 0)
 		goto out_err;
-	}
+	ssi->id = err;
 
 	ssi->owner = THIS_MODULE;
 	ssi->device.parent = &pd->dev;
-- 
1.9.1

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