linux-kernel - [ 159/262] usb: dwc3: core: fix incorrect usage of resource pointer

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Date:	Fri, 28 Sep 2012 11:51:28 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>, alan@...rguk.ukuu.org.uk,
	Ruchika Kharwar <ruchika@...com>,
	Moiz Sonasath <m-sonasath@...com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Felipe Balbi <balbi@...com>
Subject: [ 159/262] usb: dwc3: core: fix incorrect usage of resource pointer

From: Greg KH <gregkh@...uxfoundation.org>

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

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

From: Kishon Vijay Abraham I <kishon@...com>

commit 066618bc350cc6035c3a0fc559a8ac02f55785a9 upstream.

Populate the resources for xhci afresh instead of directly using the
*struct resource* of core. *resource* structure has parent, sibling,
child pointers which should be filled only by resource API's. By
directly using the *resource* pointer of core in xhci, these parent,
sibling, child pointers are already populated even before
*platform_device_add* causing side effects.

Reported-by: Ruchika Kharwar <ruchika@...com>
Tested-by: Moiz Sonasath <m-sonasath@...com>
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/dwc3/core.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -429,16 +429,21 @@ static int __devinit dwc3_probe(struct p
 		dev_err(dev, "missing IRQ\n");
 		return -ENODEV;
 	}
-	dwc->xhci_resources[1] = *res;
+	dwc->xhci_resources[1].start = res->start;
+	dwc->xhci_resources[1].end = res->end;
+	dwc->xhci_resources[1].flags = res->flags;
+	dwc->xhci_resources[1].name = res->name;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(dev, "missing memory resource\n");
 		return -ENODEV;
 	}
-	dwc->xhci_resources[0] = *res;
+	dwc->xhci_resources[0].start = res->start;
 	dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
 					DWC3_XHCI_REGS_END;
+	dwc->xhci_resources[0].flags = res->flags;
+	dwc->xhci_resources[0].name = res->name;
 
 	 /*
 	  * Request memory region but exclude xHCI regs,


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