linux-kernel - [PATCH 3.13 189/259] can: c_can_platform: Fix raminit, use devm_ioremap() instead of devm_ioremap

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Date:	Fri,  8 Aug 2014 13:40:12 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	George Cherian <george.cherian@...com>,
	Mugunthan V N <mugunthanvnm@...com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 189/259] can: c_can_platform: Fix raminit, use devm_ioremap() instead of devm_ioremap_resource()

3.13.11.6 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: George Cherian <george.cherian@...com>

commit 33cf75656923ff11d67a937a4f8e9344f58cea77 upstream.

The raminit register is shared register for both can0 and can1. Since commit:

    32766ff net: can: Convert to use devm_ioremap_resource

devm_ioremap_resource() is used to map raminit register. When using both
interfaces the mapping for the can1 interface fails, leading to a non
functional can interface.

Signed-off-by: George Cherian <george.cherian@...com>
Signed-off-by: Mugunthan V N <mugunthanvnm@...com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/net/can/c_can/c_can_platform.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/c_can/c_can_platform.c b/drivers/net/can/c_can/c_can_platform.c
index d66ac26..873b83a 100644
--- a/drivers/net/can/c_can/c_can_platform.c
+++ b/drivers/net/can/c_can/c_can_platform.c
@@ -194,7 +194,8 @@ static int c_can_plat_probe(struct platform_device *pdev)
 			priv->instance = pdev->id;
 
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-		priv->raminit_ctrlreg = devm_ioremap_resource(&pdev->dev, res);
+		priv->raminit_ctrlreg = devm_ioremap(&pdev->dev, res->start,
+						     resource_size(res));
 		if (IS_ERR(priv->raminit_ctrlreg) || (int)priv->instance < 0)
 			dev_info(&pdev->dev, "control memory is not used for raminit\n");
 		else
-- 
1.9.1

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