openwrt/package/kernel/mac80211/patches/475-v5.4-0002-brcmfmac-add-reset-debugfs-entry-for-testing-reset.patch
Rafał Miłecki 7393ce8d87 mac80211: brcmfmac: backport more kernel 5.4 changes
Patch getting RAM info got upstreamed. A debugging fs entry for testing
reset feature was added.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 681acdcc54)
2019-09-09 12:57:56 +02:00

60 lines
1.8 KiB
Diff

From 2f8c8e62cd50d72ac68de884a09c6f5a969a269c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Sun, 1 Sep 2019 13:34:36 +0200
Subject: [PATCH] brcmfmac: add "reset" debugfs entry for testing reset
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This is a trivial debugfs entry for triggering reset just like in case
of firmware crash. It works by writing 1 to it:
echo 1 > reset
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../broadcom/brcm80211/brcmfmac/core.c | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
@@ -1117,6 +1117,29 @@ static void brcmf_core_bus_reset(struct
brcmf_bus_reset(drvr->bus_if);
}
+static ssize_t bus_reset_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct brcmf_pub *drvr = file->private_data;
+ u8 value;
+
+ if (kstrtou8_from_user(user_buf, count, 0, &value))
+ return -EINVAL;
+
+ if (value != 1)
+ return -EINVAL;
+
+ schedule_work(&drvr->bus_reset);
+
+ return count;
+}
+
+static const struct file_operations bus_reset_fops = {
+ .open = simple_open,
+ .llseek = no_llseek,
+ .write = bus_reset_write,
+};
+
static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
{
int ret = -1;
@@ -1192,6 +1215,8 @@ static int brcmf_bus_started(struct brcm
/* populate debugfs */
brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
+ debugfs_create_file("reset", 0600, brcmf_debugfs_get_devdir(drvr), drvr,
+ &bus_reset_fops);
brcmf_feat_debugfs_create(drvr);
brcmf_proto_debugfs_create(drvr);