package/kernel/mac80211/patches/brcm/110-v5.4-0002-brcmfmac-add-reset-debugfs-entry-for-testing-reset.patch

   1 From 2f8c8e62cd50d72ac68de884a09c6f5a969a269c Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Sun, 1 Sep 2019 13:34:36 +0200
   4 Subject: [PATCH] brcmfmac: add "reset" debugfs entry for testing reset
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 This is a trivial debugfs entry for triggering reset just like in case
  10 of firmware crash. It works by writing 1 to it:
  11 echo 1 > reset
  12
  13 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  14 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  15 ---
  16  .../broadcom/brcm80211/brcmfmac/core.c        | 25 +++++++++++++++++++
  17  1 file changed, 25 insertions(+)
  18
  19 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
  20 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
  21 @@ -1107,6 +1107,29 @@ static void brcmf_core_bus_reset(struct
  22         brcmf_bus_reset(drvr->bus_if);
  23  }
  24
  25 +static ssize_t bus_reset_write(struct file *file, const char __user *user_buf,
  26 +                              size_t count, loff_t *ppos)
  27 +{
  28 +       struct brcmf_pub *drvr = file->private_data;
  29 +       u8 value;
  30 +
  31 +       if (kstrtou8_from_user(user_buf, count, 0, &value))
  32 +               return -EINVAL;
  33 +
  34 +       if (value != 1)
  35 +               return -EINVAL;
  36 +
  37 +       schedule_work(&drvr->bus_reset);
  38 +
  39 +       return count;
  40 +}
  41 +
  42 +static const struct file_operations bus_reset_fops = {
  43 +       .open   = simple_open,
  44 +       .llseek = no_llseek,
  45 +       .write  = bus_reset_write,
  46 +};
  47 +
  48  static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
  49  {
  50         int ret = -1;
  51 @@ -1182,6 +1205,8 @@ static int brcmf_bus_started(struct brcm
  52
  53         /* populate debugfs */
  54         brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
  55 +       debugfs_create_file("reset", 0600, brcmf_debugfs_get_devdir(drvr), drvr,
  56 +                           &bus_reset_fops);
  57         brcmf_feat_debugfs_create(drvr);
  58         brcmf_proto_debugfs_create(drvr);
  59         brcmf_bus_debugfs_create(bus_if);