linux-kernel - RE: Problem with /proc/iomem on ARM

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Message-ID: <BD79186B4FD85F4B8E60E381CAEE190901A13854@mi8nycmail19.Mi8.com>
Date:	Wed, 1 Jul 2009 14:24:52 -0400
From:	"H Hartley Sweeten" <hartleys@...ionengravers.com>
To:	"Kay Sievers" <kay.sievers@...y.org>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: Problem with /proc/iomem on ARM

On Wednesday, July 01, 2009 11:13 AM, Kay Sievers wrote:
>> The serial ports on my system are amba bus devices.
>>
>>> After all, it seems like this should be fixed in arm somewhere, not to
>>> copy and store internal driver core pointers, but use the device
>>> itself to retrieve the values.
>>
>> Maybe the problem is in drivers/amba/bus.c? amba_device_register() does:
>>
>>        dev->res.name = dev_name(&dev->dev);
>
> Looks like. If you get the name directly from dev->init_name. Does that work?
>

The following patch does fix /proc/iomem for the amba uarts on my system.
Is this the correct approach to fixing the issue?

Regards,
Hartley

---

amba: set resource init_name

Noticed on ep93xx ARM system, /proc/iomem is missing the names for amba bus
devices.

I appears that drivers/amba/bus.c does not set the kobject to allow dev_name()
to return the device name.  Just use the init_name directly.

Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>

---

diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 3d763fd..9bfb9f7 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -210,7 +210,7 @@ int amba_device_register(struct amba_device *dev, struct resource *parent)
 	dev->dev.release = amba_device_release;
 	dev->dev.bus = &amba_bustype;
 	dev->dev.dma_mask = &dev->dma_mask;
-	dev->res.name = dev_name(&dev->dev);
+	dev->res.name = dev->dev.init_name;
 
 	if (!dev->dev.coherent_dma_mask && dev->dma_mask)
 		dev_warn(&dev->dev, "coherent dma mask is unset\n");