mac80211: backport some brcmfmac patches

There are two important patches in this patchset: updating read pointer
quicker & rework of .get_station().
There are few more upstream patches that are p2p-related and weren't
backported in this commit.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

Backport of r46084

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46100 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 69 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/388-brcmfmac-use-debugfs_create_devm_seqfile-helper-func.patch b/package/kernel/mac80211/patches/388-brcmfmac-use-debugfs_create_devm_seqfile-helper-func.patch
new file mode 100644
index 0000000000..756fbb2cb7
--- /dev/null
+++ b/package/kernel/mac80211/patches/388-brcmfmac-use-debugfs_create_devm_seqfile-helper-func.patch
@@ -0,0 +1,69 @@
+From: Arend van Spriel <arend@broadcom.com>
+Date: Mon, 8 Jun 2015 14:38:35 +0200
+Subject: [PATCH] brcmfmac: use debugfs_create_devm_seqfile() helper
+ function
+
+Some time ago the function debugfs_create_devm_seqfile() was
+introduced in debugfs. The caller simply needs to provide a
+device pointer and read function. The function brcmf_debugfs_add_entry()
+is now simply a wrapper only doing the work for CONFIG_BRCMDBG.
+
+Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
+Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
+Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
+Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
+Signed-off-by: Arend van Spriel <arend@broadcom.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+
+--- a/drivers/net/wireless/brcm80211/brcmfmac/debug.c
++++ b/drivers/net/wireless/brcm80211/brcmfmac/debug.c
+@@ -64,44 +64,12 @@ struct dentry *brcmf_debugfs_get_devdir(
+ 	return drvr->dbgfs_dir;
+ }
+ 
+-struct brcmf_debugfs_entry {
+-	int (*read)(struct seq_file *seq, void *data);
+-	struct brcmf_pub *drvr;
+-};
+-
+-static int brcmf_debugfs_entry_open(struct inode *inode, struct file *f)
+-{
+-	struct brcmf_debugfs_entry *entry = inode->i_private;
+-
+-	return single_open(f, entry->read, entry->drvr->bus_if->dev);
+-}
+-
+-static const struct file_operations brcmf_debugfs_def_ops = {
+-	.owner = THIS_MODULE,
+-	.open = brcmf_debugfs_entry_open,
+-	.release = single_release,
+-	.read = seq_read,
+-	.llseek = seq_lseek
+-};
+-
+ int brcmf_debugfs_add_entry(struct brcmf_pub *drvr, const char *fn,
+ 			    int (*read_fn)(struct seq_file *seq, void *data))
+ {
+-	struct dentry *dentry =  drvr->dbgfs_dir;
+-	struct brcmf_debugfs_entry *entry;
+-
+-	if (IS_ERR_OR_NULL(dentry))
+-		return -ENOENT;
+-
+-	entry = devm_kzalloc(drvr->bus_if->dev, sizeof(*entry), GFP_KERNEL);
+-	if (!entry)
+-		return -ENOMEM;
+-
+-	entry->read = read_fn;
+-	entry->drvr = drvr;
+-
+-	dentry = debugfs_create_file(fn, S_IRUGO, dentry, entry,
+-				     &brcmf_debugfs_def_ops);
++	struct dentry *e;
+ 
+-	return PTR_ERR_OR_ZERO(dentry);
++	e = debugfs_create_devm_seqfile(drvr->bus_if->dev, fn,
++					drvr->dbgfs_dir, read_fn);
++	return PTR_ERR_OR_ZERO(e);
+ }