openwrt/target/linux/brcm2708/patches-4.4/0534-brcmvirt_gpio-Pass-device-structure-into-dma_zalloc_.patch

From 4b40f23d8afba2fe227e515d0c793e95530350b2 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Mon, 14 Nov 2016 17:46:54 +0000
Subject: [PATCH] brcmvirt_gpio: Pass device structure into dma_zalloc_coherent

---
 drivers/gpio/gpio-bcm-virt.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/gpio/gpio-bcm-virt.c
+++ b/drivers/gpio/gpio-bcm-virt.c
@@ -102,7 +102,7 @@ static int brcmvirt_gpio_probe(struct pl
 		goto out;
 	}
 
-	ucb->ts_base = dma_zalloc_coherent(NULL, PAGE_SIZE, &ucb->bus_addr, GFP_KERNEL);
+	ucb->ts_base = dma_zalloc_coherent(dev, PAGE_SIZE, &ucb->bus_addr, GFP_KERNEL);
 	if (!ucb->ts_base) {
 		pr_err("[%s]: failed to dma_alloc_coherent(%ld)\n",
 				__func__, PAGE_SIZE);
@@ -116,7 +116,7 @@ static int brcmvirt_gpio_probe(struct pl
 
 	if (err || gpiovirtbuf != 0) {
 		dev_warn(dev, "Failed to set gpiovirtbuf, trying to get err:%x\n", err);
-		dma_free_coherent(NULL, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
+		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
 		ucb->ts_base = 0;
 		ucb->bus_addr = 0;
 	}
@@ -168,7 +168,7 @@ static int brcmvirt_gpio_probe(struct pl
 	return 0;
 out:
 	if (ucb->bus_addr) {
-		dma_free_coherent(NULL, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
+		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
 		ucb->bus_addr = 0;
 		ucb->ts_base = NULL;
 	} else if (ucb->ts_base) {
@@ -180,12 +180,13 @@ out:
 
 static int brcmvirt_gpio_remove(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	int err = 0;
 	struct brcmvirt_gpio *ucb = platform_get_drvdata(pdev);
 
 	gpiochip_remove(&ucb->gc);
 	if (ucb->bus_addr)
-		dma_free_coherent(NULL, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
+		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
 	else if (ucb->ts_base)
 		iounmap(ucb->ts_base);
 	return err;