target/linux/bcm53xx/patches-3.14/140-bcma-only-map-wrap-if-it-is-not-null.patch

   1 From c6516d2c672450fb27783866397a487511d90bba Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Fri, 22 Aug 2014 08:44:52 +0200
   4 Subject: [PATCH 08/17] bcma: only map wrapper if its address is available
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 The Chipcommon B core does not have a wrap address and it would fail here.
  10
  11 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  12 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  13 ---
  14  drivers/bcma/host_soc.c |  4 ++++
  15  drivers/bcma/scan.c     | 11 +++++++----
  16  2 files changed, 11 insertions(+), 4 deletions(-)
  17
  18 --- a/drivers/bcma/host_soc.c
  19 +++ b/drivers/bcma/host_soc.c
  20 @@ -137,12 +137,16 @@ static void bcma_host_soc_block_write(st
  21
  22  static u32 bcma_host_soc_aread32(struct bcma_device *core, u16 offset)
  23  {
  24 +       if (WARN_ONCE(!core->io_wrap, "Accessed core has no wrapper/agent\n"))
  25 +               return ~0;
  26         return readl(core->io_wrap + offset);
  27  }
  28
  29  static void bcma_host_soc_awrite32(struct bcma_device *core, u16 offset,
  30                                   u32 value)
  31  {
  32 +       if (WARN_ONCE(!core->io_wrap, "Accessed core has no wrapper/agent\n"))
  33 +               return;
  34         writel(value, core->io_wrap + offset);
  35  }
  36
  37 --- a/drivers/bcma/scan.c
  38 +++ b/drivers/bcma/scan.c
  39 @@ -421,10 +421,13 @@ static int bcma_get_next_core(struct bcm
  40                 core->io_addr = ioremap_nocache(core->addr, BCMA_CORE_SIZE);
  41                 if (!core->io_addr)
  42                         return -ENOMEM;
  43 -               core->io_wrap = ioremap_nocache(core->wrap, BCMA_CORE_SIZE);
  44 -               if (!core->io_wrap) {
  45 -                       iounmap(core->io_addr);
  46 -                       return -ENOMEM;
  47 +               if (core->wrap) {
  48 +                       core->io_wrap = ioremap_nocache(core->wrap,
  49 +                                                       BCMA_CORE_SIZE);
  50 +                       if (!core->io_wrap) {
  51 +                               iounmap(core->io_addr);
  52 +                               return -ENOMEM;
  53 +                       }
  54                 }
  55         }
  56         return 0;