target/linux/brcm2708/patches-4.4/0152-bcm2835-sdhost-Restore-ATOMIC-flag-to-PIO-sg-mapping.patch

   1 From f395ff998f2bde846499b1a0ef84519989dc2d4e Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 15 Feb 2016 10:00:27 +0000
   4 Subject: [PATCH 152/170] bcm2835-sdhost: Restore ATOMIC flag to PIO sg mapping
   5
   6 Allocation problems have been seen in a wireless driver, and
   7 this is the only change which might have been responsible.
   8 ---
   9  drivers/mmc/host/bcm2835-sdhost.c | 7 +++----
  10  1 file changed, 3 insertions(+), 4 deletions(-)
  11
  12 --- a/drivers/mmc/host/bcm2835-sdhost.c
  13 +++ b/drivers/mmc/host/bcm2835-sdhost.c
  14 @@ -874,15 +874,14 @@ static void bcm2835_sdhost_prepare_data(
  15         host->flush_fifo = 0;
  16         host->data->bytes_xfered = 0;
  17
  18 -
  19         if (!host->dma_desc) {
  20                 /* Use PIO */
  21 -               int flags;
  22 +               int flags = SG_MITER_ATOMIC;
  23
  24                 if (data->flags & MMC_DATA_READ)
  25 -                       flags = SG_MITER_TO_SG;
  26 +                       flags |= SG_MITER_TO_SG;
  27                 else
  28 -                       flags = SG_MITER_FROM_SG;
  29 +                       flags |= SG_MITER_FROM_SG;
  30                 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
  31                 host->blocks = data->blocks;
  32         }