From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Thu, 10 Jul 2014 20:34:25 +0000 (+0200)
Subject: backports: add pci_zalloc_consistent()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b958e19fa5803736e57d106db2836acab3fdd5ae;p=openwrt%2Fstaging%2Fblogic.git

backports: add pci_zalloc_consistent()

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/backport/backport-include/asm-generic/pci-dma-compat.h b/backport/backport-include/asm-generic/pci-dma-compat.h
new file mode 100644
index 000000000000..ed4877462cb9
--- /dev/null
+++ b/backport/backport-include/asm-generic/pci-dma-compat.h
@@ -0,0 +1,17 @@
+#ifndef __BACKPORT_ASM_GENERIC_PCI_DMA_COMPAT_H
+#define __BACKPORT_ASM_GENERIC_PCI_DMA_COMPAT_H
+#include_next <asm-generic/pci-dma-compat.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
+#define pci_zalloc_consistent LINUX_BACKPORT(pci_zalloc_consistent)
+static inline void *pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
+					  dma_addr_t *dma_handle)
+{
+	void *ret = pci_alloc_consistent(hwdev, size, dma_handle);
+	if (ret)
+		memset(ret, 0, size);
+	return ret;
+}
+#endif
+
+#endif /* __BACKPORT_ASM_GENERIC_PCI_DMA_COMPAT_H */