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mac80211: brcmfmac: backport the last 5.4 changes

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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 f39f4b2f6d)
This commit is contained in:
Rafał Miłecki 2019-09-16 08:04:27 +02:00
parent 90f6af5108
commit 5880dd48d5
4 changed files with 402 additions and 1 deletions
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95
package/kernel/mac80211/patches/477-v5.4-0001-brcmfmac-move-cfg80211_ops-pointer-to-another-struct.patch Normal file
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@ -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
@@ -7186,7 +7186,6 @@ 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
@@ -303,7 +303,6 @@ 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
@@ -1254,12 +1254,15 @@ 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;
@@ -1292,12 +1295,10 @@ int brcmf_attach(struct device *dev, str
goto fail;
}
- drvr->config->ops = ops;
return 0;
fail:
brcmf_detach(dev);
- kfree(ops);
return ret;
}
@@ -1383,6 +1384,8 @@ 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
@@ -108,6 +108,7 @@ 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 */

255
package/kernel/mac80211/patches/477-v5.4-0002-brcmfmac-split-brcmf_attach-and-brcmf_detach-functio.patch Normal file
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@ -0,0 +1,255 @@
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
@@ -254,10 +254,12 @@ 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
@@ -1239,13 +1239,11 @@ 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");
@@ -1263,6 +1261,21 @@ 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;
@@ -1271,9 +1284,6 @@ 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);
@@ -1289,7 +1299,7 @@ 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;
@@ -1381,6 +1391,15 @@ 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
@@ -1440,6 +1440,7 @@ 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);
@@ -1834,11 +1835,18 @@ 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);
}
@@ -1981,6 +1989,7 @@ 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
@@ -4140,10 +4140,17 @@ 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 fail;
+ }
+
/* 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");
+ brcmf_free(sdiod->dev);
goto fail;
}
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -1191,8 +1191,12 @@ 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;
@@ -1264,7 +1268,10 @@ 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 */
@@ -1292,6 +1299,7 @@ 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;
@@ -1305,6 +1313,7 @@ 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);
}
@@ -1449,10 +1458,12 @@ 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;
}
@@ -1465,8 +1476,19 @@ 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);

51
package/kernel/mac80211/patches/477-v5.4-0003-brcmfmac-don-t-realloc-wiphy-during-PCIe-reset.patch Normal file
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@ -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
@@ -1440,7 +1440,6 @@ 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);
@@ -1836,9 +1835,6 @@ 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;
@@ -1941,6 +1937,10 @@ 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;

2
package/kernel/mac80211/patches/860-brcmfmac-register-wiphy-s-during-module_init.patch
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@ -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
@@ -1459,6 +1459,7 @@ int __init brcmf_core_init(void)
@@ -1481,6 +1481,7 @@ int __init brcmf_core_init(void)
{
if (!schedule_work(&brcmf_driver_work))
return -EBUSY;