openwrt_lede/target/linux/brcm2708/patches-4.4/0146-bcm2835-sdhost-Restore-ATOMIC-flag-to-PIO-sg-mapping.patch

From dc519294e6a463eae2f1ad1d65fd06b1c4d10c96 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 15 Feb 2016 10:00:27 +0000
Subject: [PATCH] bcm2835-sdhost: Restore ATOMIC flag to PIO sg mapping

Allocation problems have been seen in a wireless driver, and
this is the only change which might have been responsible.
---
 drivers/mmc/host/bcm2835-sdhost.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/mmc/host/bcm2835-sdhost.c
+++ b/drivers/mmc/host/bcm2835-sdhost.c
@@ -874,15 +874,14 @@ static void bcm2835_sdhost_prepare_data(
 	host->flush_fifo = 0;
 	host->data->bytes_xfered = 0;
 
-
 	if (!host->dma_desc) {
 		/* Use PIO */
-		int flags;
+		int flags = SG_MITER_ATOMIC;
 
 		if (data->flags & MMC_DATA_READ)
-			flags = SG_MITER_TO_SG;
+			flags |= SG_MITER_TO_SG;
 		else
-			flags = SG_MITER_FROM_SG;
+			flags |= SG_MITER_FROM_SG;
 		sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
 		host->blocks = data->blocks;
 	}