target/linux/ipq806x/patches-4.4/308-soc-qcom-ipq806x-Increase-Atomic-Coherent-Pool-size.patch

   1 From 689a8f1ec58a88152669d21572a1539ad34024cb Mon Sep 17 00:00:00 2001
   2 From: Varadarajan Narayanan <varada@codeaurora.org>
   3 Date: Mon, 30 Mar 2015 13:25:21 +0530
   4 Subject: soc: qcom: ipq806x: Increase Atomic Coherent Pool size
   5
   6 Linux 3.14, by default allocates a 256K Atomic Coherent Pool.
   7 However, Linux 3.4 seems to have allocated ~1.8M for the same.
   8 256K doesn't seem to be enough for the WiFi driver. Hence,
   9 setting the size to be similar to 3.4.
  10
  11 CRs-Fixed: 810357
  12
  13 Change-Id: I5b98a8531dcb33aff451a943f8b83402f9d13fa7
  14 Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
  15 ---
  16  arch/arm/mach-qcom/board.c | 20 ++++++++++++++++++++
  17  1 file changed, 20 insertions(+)
  18
  19 --- a/arch/arm/mach-qcom/board.c
  20 +++ b/arch/arm/mach-qcom/board.c
  21 @@ -12,6 +12,11 @@
  22
  23  #include <linux/init.h>
  24
  25 +#include <linux/err.h>
  26 +#include <linux/io.h>
  27 +#include <linux/module.h>
  28 +#include <linux/dma-mapping.h>
  29 +
  30  #include <asm/mach/arch.h>
  31
  32  static const char * const qcom_dt_match[] __initconst = {
  33 @@ -28,3 +33,19 @@ static const char * const qcom_dt_match[
  34  DT_MACHINE_START(QCOM_DT, "Qualcomm (Flattened Device Tree)")
  35         .dt_compat = qcom_dt_match,
  36  MACHINE_END
  37 +
  38 +
  39 +static int __init qcom_atomic_pool_size_set(void)
  40 +{
  41 +#define ATOMIC_DMA_COHERENT_POOL_SIZE  SZ_2M
  42 +
  43 +       init_dma_coherent_pool_size(ATOMIC_DMA_COHERENT_POOL_SIZE);
  44 +
  45 +       return 0;
  46 +}
  47 +
  48 +/*
  49 + * This should happen before atomic_pool_init(), which is a
  50 + * postcore_initcall.
  51 + */
  52 +core_initcall(qcom_atomic_pool_size_set);