From: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Date: Fri, 8 Mar 2013 02:27:05 +0000 (+0800)
Subject: usb: musb: ux500_dma: add missing MEM resource check
X-Git-Tag: firefly_0821_release~3680^2~672^2~11^2~86
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=399e0f4f00adbfdea2122c1daec0d4015f56cc7a;p=firefly-linux-kernel-4.4.55.git

usb: musb: ux500_dma: add missing MEM resource check

Fix dma_controller_create() fail path in case memory resource is
missing.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index c3a584cf01bb..2df9b7d1ddc6 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -374,12 +374,17 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *ba
 
 	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
 	if (!controller)
-		return NULL;
+		goto kzalloc_fail;
 
 	controller->private_data = musb;
 
 	/* Save physical address for DMA controller. */
 	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!iomem) {
+		dev_err(musb->controller, "no memory resource defined\n");
+		goto plat_get_fail;
+	}
+
 	controller->phy_base = (dma_addr_t) iomem->start;
 
 	controller->controller.start = ux500_dma_controller_start;
@@ -391,4 +396,9 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *ba
 	controller->controller.is_compatible = ux500_dma_is_compatible;
 
 	return &controller->controller;
+
+plat_get_fail:
+	kfree(controller);
+kzalloc_fail:
+	return NULL;
 }