linux-kernel - RE: [PATCH v5] ppc44x:PHY fixup for USB on canyonlands board

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Date:	Mon, 13 Dec 2010 12:47:43 +0530
From:	Rupjyoti Sarmah <rsarmah@....com>
To:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: RE: [PATCH v5] ppc44x:PHY fixup for USB on canyonlands board

>This can fail if you boot a new kernel on a board with an old FDT that
lacks the gpio node.  Calling of_iomap with a NULL np seems like it would
work without crashing anything, so maybe that's not a huge issue.

>>+	vaddr = of_iomap(np, 0);
>>+	if (!vaddr) {
>>+		printk(KERN_CRIT "Could not get gpio node address\n");
>>+		ret = -ENODEV;
>>+		goto err_bcsr;
>>+	}

>A reference count is leaked for the node in this error case because
of_node_put isn't called for the gpio node.  Also, iounmap is never called
on vaddr.

>>+	/* Disable USB, through the BCSR7 bits */


Thanks for your inputs. I will fix and resubmit.

Regards,
Rup
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