mac80211: brcmfmac: backport the last 5.4 changes

This makes brcmfmac use the same wiphy after PCIe reset to help user
space handle corner cases (e.g. firmware crash).

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit f39f4b2f6d4300995270f635261b07197e8cf61e)

4 files changed, 413 insertions, 1 deletions

diff --git a/package/kernel/mac80211/patches/brcm/392-v5.4-0001-brcmfmac-move-cfg80211_ops-pointer-to-another-struct.patch b/package/kernel/mac80211/patches/brcm/392-v5.4-0001-brcmfmac-move-cfg80211_ops-pointer-to-another-struct.patch
new file mode 100644
index 0000000000..b45c6fd2db
--- /dev/null
+++ b/package/kernel/mac80211/patches/brcm/392-v5.4-0001-brcmfmac-move-cfg80211_ops-pointer-to-another-struct.patch
@@ -0,0 +1,95 @@
+From ba76ff25ee64d5cfc86209d1fbb3c294b2c04412 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Tue, 3 Sep 2019 06:29:26 +0200
+Subject: [PATCH 1/3] brcmfmac: move "cfg80211_ops" pointer to another struct
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This moves "ops" pointer from "struct brcmf_cfg80211_info" to the
+"struct brcmf_pub". This movement makes it possible to allocate wiphy
+without attaching cfg80211 (brcmf_cfg80211_attach()). It's required for
+later separation of wiphy allocation and driver initialization.
+
+While at it fix also an unlikely memory leak in the brcmf_attach().
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ .../net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c  | 1 -
+ .../net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h  | 1 -
+ drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c  | 9 ++++++---
+ drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h  | 1 +
+ 4 files changed, 7 insertions(+), 5 deletions(-)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+@@ -7194,7 +7194,6 @@ void brcmf_cfg80211_detach(struct brcmf_
+ 	brcmf_pno_detach(cfg);
+ 	brcmf_btcoex_detach(cfg);
+ 	wiphy_unregister(cfg->wiphy);
+-	kfree(cfg->ops);
+ 	wl_deinit_priv(cfg);
+ 	brcmf_free_wiphy(cfg->wiphy);
+ 	kfree(cfg);
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h
+@@ -292,7 +292,6 @@ struct brcmf_cfg80211_wowl {
+  */
+ struct brcmf_cfg80211_info {
+ 	struct wiphy *wiphy;
+-	struct cfg80211_ops *ops;
+ 	struct brcmf_cfg80211_conf *conf;
+ 	struct brcmf_p2p_info p2p;
+ 	struct brcmf_btcoex_info *btcoex;
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+@@ -1245,12 +1245,15 @@ int brcmf_attach(struct device *dev, str
+ 		return -ENOMEM;
+ 
+ 	wiphy = wiphy_new(ops, sizeof(*drvr));
+-	if (!wiphy)
++	if (!wiphy) {
++		kfree(ops);
+ 		return -ENOMEM;
++	}
+ 
+ 	set_wiphy_dev(wiphy, dev);
+ 	drvr = wiphy_priv(wiphy);
+ 	drvr->wiphy = wiphy;
++	drvr->ops = ops;
+ 
+ 	for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
+ 		drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
+@@ -1283,12 +1286,10 @@ int brcmf_attach(struct device *dev, str
+ 		goto fail;
+ 	}
+ 
+-	drvr->config->ops = ops;
+ 	return 0;
+ 
+ fail:
+ 	brcmf_detach(dev);
+-	kfree(ops);
+ 
+ 	return ret;
+ }
+@@ -1374,6 +1375,8 @@ void brcmf_detach(struct device *dev)
+ 
+ 	bus_if->drvr = NULL;
+ 
++	kfree(drvr->ops);
++
+ 	wiphy_free(drvr->wiphy);
+ }
+ 
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h
+@@ -97,6 +97,7 @@ struct brcmf_pub {
+ 	struct brcmf_bus *bus_if;
+ 	struct brcmf_proto *proto;
+ 	struct wiphy *wiphy;
++	struct cfg80211_ops *ops;
+ 	struct brcmf_cfg80211_info *config;
+ 
+ 	/* Internal brcmf items */
diff --git a/package/kernel/mac80211/patches/brcm/392-v5.4-0002-brcmfmac-split-brcmf_attach-and-brcmf_detach-functio.patch b/package/kernel/mac80211/patches/brcm/392-v5.4-0002-brcmfmac-split-brcmf_attach-and-brcmf_detach-functio.patch
new file mode 100644
index 0000000000..827178b466
--- /dev/null
+++ b/package/kernel/mac80211/patches/brcm/392-v5.4-0002-brcmfmac-split-brcmf_attach-and-brcmf_detach-functio.patch
@@ -0,0 +1,266 @@
+From 450914c39f88d1adada26256360dea7050ff4e83 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Tue, 3 Sep 2019 06:29:27 +0200
+Subject: [PATCH 2/3] brcmfmac: split brcmf_attach() and brcmf_detach()
+ functions
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Move code allocating/freeing wiphy out of above functions. This will
+allow reinitializing the driver (e.g. on some error) without allocating
+a new wiphy.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ .../broadcom/brcm80211/brcmfmac/bus.h         |  4 ++-
+ .../broadcom/brcm80211/brcmfmac/core.c        | 33 ++++++++++++++----
+ .../broadcom/brcm80211/brcmfmac/pcie.c        | 13 +++++--
+ .../broadcom/brcm80211/brcmfmac/sdio.c        | 15 ++++++--
+ .../broadcom/brcm80211/brcmfmac/usb.c         | 34 +++++++++++++++----
+ 5 files changed, 80 insertions(+), 19 deletions(-)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h
+@@ -253,10 +253,12 @@ void brcmf_rx_frame(struct device *dev,
+ /* Receive async event packet from firmware. Callee disposes of rxp. */
+ void brcmf_rx_event(struct device *dev, struct sk_buff *rxp);
+ 
++int brcmf_alloc(struct device *dev, struct brcmf_mp_device *settings);
+ /* Indication from bus module regarding presence/insertion of dongle. */
+-int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings);
++int brcmf_attach(struct device *dev);
+ /* Indication from bus module regarding removal/absence of dongle */
+ void brcmf_detach(struct device *dev);
++void brcmf_free(struct device *dev);
+ /* Indication from bus module that dongle should be reset */
+ void brcmf_dev_reset(struct device *dev);
+ /* Request from bus module to initiate a coredump */
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+@@ -1230,13 +1230,11 @@ fail:
+ 	return ret;
+ }
+ 
+-int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
++int brcmf_alloc(struct device *dev, struct brcmf_mp_device *settings)
+ {
+ 	struct wiphy *wiphy;
+ 	struct cfg80211_ops *ops;
+ 	struct brcmf_pub *drvr = NULL;
+-	int ret = 0;
+-	int i;
+ 
+ 	brcmf_dbg(TRACE, "Enter\n");
+ 
+@@ -1254,6 +1252,21 @@ int brcmf_attach(struct device *dev, str
+ 	drvr = wiphy_priv(wiphy);
+ 	drvr->wiphy = wiphy;
+ 	drvr->ops = ops;
++	drvr->bus_if = dev_get_drvdata(dev);
++	drvr->bus_if->drvr = drvr;
++	drvr->settings = settings;
++
++	return 0;
++}
++
++int brcmf_attach(struct device *dev)
++{
++	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
++	struct brcmf_pub *drvr = bus_if->drvr;
++	int ret = 0;
++	int i;
++
++	brcmf_dbg(TRACE, "Enter\n");
+ 
+ 	for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
+ 		drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
+@@ -1262,9 +1275,6 @@ int brcmf_attach(struct device *dev, str
+ 
+ 	/* Link to bus module */
+ 	drvr->hdrlen = 0;
+-	drvr->bus_if = dev_get_drvdata(dev);
+-	drvr->bus_if->drvr = drvr;
+-	drvr->settings = settings;
+ 
+ 	/* Attach and link in the protocol */
+ 	ret = brcmf_proto_attach(drvr);
+@@ -1280,7 +1290,7 @@ int brcmf_attach(struct device *dev, str
+ 	/* attach firmware event handler */
+ 	brcmf_fweh_attach(drvr);
+ 
+-	ret = brcmf_bus_started(drvr, ops);
++	ret = brcmf_bus_started(drvr, drvr->ops);
+ 	if (ret != 0) {
+ 		bphy_err(drvr, "dongle is not responding: err=%d\n", ret);
+ 		goto fail;
+@@ -1372,6 +1382,15 @@ void brcmf_detach(struct device *dev)
+ 		brcmf_cfg80211_detach(drvr->config);
+ 		drvr->config = NULL;
+ 	}
++}
++
++void brcmf_free(struct device *dev)
++{
++	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
++	struct brcmf_pub *drvr = bus_if->drvr;
++
++	if (!drvr)
++		return;
+ 
+ 	bus_if->drvr = NULL;
+ 
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+@@ -1430,6 +1430,7 @@ static int brcmf_pcie_reset(struct devic
+ 	brcmf_pcie_bus_console_read(devinfo, true);
+ 
+ 	brcmf_detach(dev);
++	brcmf_free(dev);
+ 
+ 	brcmf_pcie_release_irq(devinfo);
+ 	brcmf_pcie_release_scratchbuffers(devinfo);
+@@ -1824,11 +1825,18 @@ static void brcmf_pcie_setup(struct devi
+ 
+ 	brcmf_pcie_intr_enable(devinfo);
+ 	brcmf_pcie_hostready(devinfo);
+-	if (brcmf_attach(&devinfo->pdev->dev, devinfo->settings) == 0)
+-		return;
++
++	ret = brcmf_alloc(&devinfo->pdev->dev, devinfo->settings);
++	if (ret)
++		goto fail;
++	ret = brcmf_attach(&devinfo->pdev->dev);
++	if (ret)
++		goto fail;
+ 
+ 	brcmf_pcie_bus_console_read(devinfo, false);
+ 
++	return;
++
+ fail:
+ 	device_release_driver(dev);
+ }
+@@ -1971,6 +1979,7 @@ brcmf_pcie_remove(struct pci_dev *pdev)
+ 		brcmf_pcie_intr_disable(devinfo);
+ 
+ 	brcmf_detach(&pdev->dev);
++	brcmf_free(&pdev->dev);
+ 
+ 	kfree(bus->bus_priv.pcie);
+ 	kfree(bus->msgbuf->flowrings);
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+@@ -4251,17 +4251,26 @@ static void brcmf_sdio_firmware_callback
+ 	sdiod->bus_if->chip = bus->ci->chip;
+ 	sdiod->bus_if->chiprev = bus->ci->chiprev;
+ 
++	err = brcmf_alloc(sdiod->dev, sdiod->settings);
++	if (err) {
++		brcmf_err("brcmf_alloc failed\n");
++		goto claim;
++	}
++
+ 	/* Attach to the common layer, reserve hdr space */
+-	err = brcmf_attach(sdiod->dev, sdiod->settings);
++	err = brcmf_attach(sdiod->dev);
+ 	if (err != 0) {
+ 		brcmf_err("brcmf_attach failed\n");
+-		sdio_claim_host(sdiod->func1);
+-		goto checkdied;
++		goto free;
+ 	}
+ 
+ 	/* ready */
+ 	return;
+ 
++free:
++	brcmf_free(sdiod->dev);
++claim:
++	sdio_claim_host(sdiod->func1);
+ checkdied:
+ 	brcmf_sdio_checkdied(bus);
+ release:
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+@@ -1178,8 +1178,12 @@ static void brcmf_usb_probe_phase2(struc
+ 	if (ret)
+ 		goto error;
+ 
++	ret = brcmf_alloc(devinfo->dev, devinfo->settings);
++	if (ret)
++		goto error;
++
+ 	/* Attach to the common driver interface */
+-	ret = brcmf_attach(devinfo->dev, devinfo->settings);
++	ret = brcmf_attach(devinfo->dev);
+ 	if (ret)
+ 		goto error;
+ 
+@@ -1251,7 +1255,10 @@ static int brcmf_usb_probe_cb(struct brc
+ 	}
+ 
+ 	if (!brcmf_usb_dlneeded(devinfo)) {
+-		ret = brcmf_attach(devinfo->dev, devinfo->settings);
++		ret = brcmf_alloc(devinfo->dev, devinfo->settings);
++		if (ret)
++			goto fail;
++		ret = brcmf_attach(devinfo->dev);
+ 		if (ret)
+ 			goto fail;
+ 		/* we are done */
+@@ -1279,6 +1286,7 @@ static int brcmf_usb_probe_cb(struct brc
+ 
+ fail:
+ 	/* Release resources in reverse order */
++	brcmf_free(devinfo->dev);
+ 	kfree(bus);
+ 	brcmf_usb_detach(devinfo);
+ 	return ret;
+@@ -1292,6 +1300,7 @@ brcmf_usb_disconnect_cb(struct brcmf_usb
+ 	brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
+ 
+ 	brcmf_detach(devinfo->dev);
++	brcmf_free(devinfo->dev);
+ 	kfree(devinfo->bus_pub.bus);
+ 	brcmf_usb_detach(devinfo);
+ }
+@@ -1435,10 +1444,12 @@ static int brcmf_usb_suspend(struct usb_
+ 
+ 	brcmf_dbg(USB, "Enter\n");
+ 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
+-	if (devinfo->wowl_enabled)
++	if (devinfo->wowl_enabled) {
+ 		brcmf_cancel_all_urbs(devinfo);
+-	else
++	} else {
+ 		brcmf_detach(&usb->dev);
++		brcmf_free(&usb->dev);
++	}
+ 	return 0;
+ }
+ 
+@@ -1451,8 +1462,19 @@ static int brcmf_usb_resume(struct usb_i
+ 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
+ 
+ 	brcmf_dbg(USB, "Enter\n");
+-	if (!devinfo->wowl_enabled)
+-		return brcmf_attach(devinfo->dev, devinfo->settings);
++	if (!devinfo->wowl_enabled) {
++		int err;
++
++		err = brcmf_alloc(&usb->dev, devinfo->settings);
++		if (err)
++			return err;
++
++		err = brcmf_attach(devinfo->dev);
++		if (err) {
++			brcmf_free(devinfo->dev);
++			return err;
++		}
++	}
+ 
+ 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
+ 	brcmf_usb_rx_fill_all(devinfo);
diff --git a/package/kernel/mac80211/patches/brcm/392-v5.4-0003-brcmfmac-don-t-realloc-wiphy-during-PCIe-reset.patch b/package/kernel/mac80211/patches/brcm/392-v5.4-0003-brcmfmac-don-t-realloc-wiphy-during-PCIe-reset.patch
new file mode 100644
index 0000000000..511f24dd72
--- /dev/null
+++ b/package/kernel/mac80211/patches/brcm/392-v5.4-0003-brcmfmac-don-t-realloc-wiphy-during-PCIe-reset.patch
@@ -0,0 +1,51 @@
+From a1f5aac1765afbeace9581afa27da34085f68e1d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Tue, 3 Sep 2019 06:29:28 +0200
+Subject: [PATCH 3/3] brcmfmac: don't realloc wiphy during PCIe reset
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Providing a new wiphy on every PCIe reset was confusing and was causing
+configuration problems for some users (supplicant and authenticators).
+Sticking to the existing wiphy should make error recovery much simpler
+and more reliable.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+@@ -1430,7 +1430,6 @@ static int brcmf_pcie_reset(struct devic
+ 	brcmf_pcie_bus_console_read(devinfo, true);
+ 
+ 	brcmf_detach(dev);
+-	brcmf_free(dev);
+ 
+ 	brcmf_pcie_release_irq(devinfo);
+ 	brcmf_pcie_release_scratchbuffers(devinfo);
+@@ -1826,9 +1825,6 @@ static void brcmf_pcie_setup(struct devi
+ 	brcmf_pcie_intr_enable(devinfo);
+ 	brcmf_pcie_hostready(devinfo);
+ 
+-	ret = brcmf_alloc(&devinfo->pdev->dev, devinfo->settings);
+-	if (ret)
+-		goto fail;
+ 	ret = brcmf_attach(&devinfo->pdev->dev);
+ 	if (ret)
+ 		goto fail;
+@@ -1931,6 +1927,10 @@ brcmf_pcie_probe(struct pci_dev *pdev, c
+ 	bus->wowl_supported = pci_pme_capable(pdev, PCI_D3hot);
+ 	dev_set_drvdata(&pdev->dev, bus);
+ 
++	ret = brcmf_alloc(&devinfo->pdev->dev, devinfo->settings);
++	if (ret)
++		goto fail_bus;
++
+ 	fwreq = brcmf_pcie_prepare_fw_request(devinfo);
+ 	if (!fwreq) {
+ 		ret = -ENOMEM;
diff --git a/package/kernel/mac80211/patches/brcm/860-brcmfmac-register-wiphy-s-during-module_init.patch b/package/kernel/mac80211/patches/brcm/860-brcmfmac-register-wiphy-s-during-module_init.patch
index b63f076695..000333c928 100644
--- a/package/kernel/mac80211/patches/brcm/860-brcmfmac-register-wiphy-s-during-module_init.patch
+++ b/package/kernel/mac80211/patches/brcm/860-brcmfmac-register-wiphy-s-during-module_init.patch
@@ -13,7 +13,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
 
 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
-@@ -1450,6 +1450,7 @@ int __init brcmf_core_init(void)
+@@ -1472,6 +1472,7 @@ int __init brcmf_core_init(void)
  {
  	if (!schedule_work(&brcmf_driver_work))
  		return -EBUSY;