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mac80211: brcmfmac: backport previously skipped USB fixes 

They were skipped due to missing BCDC patches that are backported now.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki 2019-07-22 13:16:33 +02:00
parent 7da50e5f62
commit b5b5b23b30
3 changed files with 342 additions and 1 deletions
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124
package/kernel/mac80211/patches/341-v5.2-0001-brcmfmac-fix-WARNING-during-USB-disconnect-in-case-o.patch Normal file
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@ -0,0 +1,124 @@
From c80d26e81ef1802f30364b4ad1955c1443a592b9 Mon Sep 17 00:00:00 2001
From: Piotr Figiel <p.figiel@camlintechnologies.com>
Date: Mon, 4 Mar 2019 15:42:49 +0000
Subject: [PATCH] brcmfmac: fix WARNING during USB disconnect in case of
unempty psq
brcmu_pkt_buf_free_skb emits WARNING when attempting to free a sk_buff
which is part of any queue. After USB disconnect this may have happened
when brcmf_fws_hanger_cleanup() is called as per-interface psq was never
cleaned when removing the interface.
Change brcmf_fws_macdesc_cleanup() in a way that it removes the
corresponding packets from hanger table (to avoid double-free when
brcmf_fws_hanger_cleanup() is called) and add a call to clean-up the
interface specific packet queue.
Below is a WARNING during USB disconnect with Raspberry Pi WiFi dongle
running in AP mode. This was reproducible when the interface was
transmitting during the disconnect and is fixed with this commit.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1171 at drivers/net/wireless/broadcom/brcm80211/brcmutil/utils.c:49 brcmu_pkt_buf_free_skb+0x3c/0x40
Modules linked in: nf_log_ipv4 nf_log_common xt_LOG xt_limit iptable_mangle xt_connmark xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter ip_tables x_tables usb_f_mass_storage usb_f_rndis u_ether cdc_acm smsc95xx usbnet ci_hdrc_imx ci_hdrc ulpi usbmisc_imx 8250_exar 8250_pci 8250 8250_base libcomposite configfs udc_core
CPU: 0 PID: 1171 Comm: kworker/0:0 Not tainted 4.19.23-00075-gde33ed8 #99
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
Workqueue: usb_hub_wq hub_event
[<8010ff84>] (unwind_backtrace) from [<8010bb64>] (show_stack+0x10/0x14)
[<8010bb64>] (show_stack) from [<80840278>] (dump_stack+0x88/0x9c)
[<80840278>] (dump_stack) from [<8011f5ec>] (__warn+0xfc/0x114)
[<8011f5ec>] (__warn) from [<8011f71c>] (warn_slowpath_null+0x40/0x48)
[<8011f71c>] (warn_slowpath_null) from [<805a476c>] (brcmu_pkt_buf_free_skb+0x3c/0x40)
[<805a476c>] (brcmu_pkt_buf_free_skb) from [<805bb6c4>] (brcmf_fws_cleanup+0x1e4/0x22c)
[<805bb6c4>] (brcmf_fws_cleanup) from [<805bc854>] (brcmf_fws_del_interface+0x58/0x68)
[<805bc854>] (brcmf_fws_del_interface) from [<805b66ac>] (brcmf_remove_interface+0x40/0x150)
[<805b66ac>] (brcmf_remove_interface) from [<805b6870>] (brcmf_detach+0x6c/0xb0)
[<805b6870>] (brcmf_detach) from [<805bdbb8>] (brcmf_usb_disconnect+0x30/0x4c)
[<805bdbb8>] (brcmf_usb_disconnect) from [<805e5d64>] (usb_unbind_interface+0x5c/0x1e0)
[<805e5d64>] (usb_unbind_interface) from [<804aab10>] (device_release_driver_internal+0x154/0x1ec)
[<804aab10>] (device_release_driver_internal) from [<804a97f4>] (bus_remove_device+0xcc/0xf8)
[<804a97f4>] (bus_remove_device) from [<804a6fc0>] (device_del+0x118/0x308)
[<804a6fc0>] (device_del) from [<805e488c>] (usb_disable_device+0xa0/0x1c8)
[<805e488c>] (usb_disable_device) from [<805dcf98>] (usb_disconnect+0x70/0x1d8)
[<805dcf98>] (usb_disconnect) from [<805ddd84>] (hub_event+0x464/0xf50)
[<805ddd84>] (hub_event) from [<80135a70>] (process_one_work+0x138/0x3f8)
[<80135a70>] (process_one_work) from [<80135d5c>] (worker_thread+0x2c/0x554)
[<80135d5c>] (worker_thread) from [<8013b1a0>] (kthread+0x124/0x154)
[<8013b1a0>] (kthread) from [<801010e8>] (ret_from_fork+0x14/0x2c)
Exception stack(0xecf8dfb0 to 0xecf8dff8)
dfa0: 00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
---[ end trace 38d234018e9e2a90 ]---
------------[ cut here ]------------
Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../broadcom/brcm80211/brcmfmac/fwsignal.c | 42 +++++++++++--------
1 file changed, 24 insertions(+), 18 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
@@ -579,24 +579,6 @@ static bool brcmf_fws_ifidx_match(struct
return ifidx == *(int *)arg;
}
-static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
- int ifidx)
-{
- bool (*matchfn)(struct sk_buff *, void *) = NULL;
- struct sk_buff *skb;
- int prec;
-
- if (ifidx != -1)
- matchfn = brcmf_fws_ifidx_match;
- for (prec = 0; prec < q->num_prec; prec++) {
- skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
- while (skb) {
- brcmu_pkt_buf_free_skb(skb);
- skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
- }
- }
-}
-
static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
{
int i;
@@ -668,6 +650,28 @@ static inline int brcmf_fws_hanger_poppk
return 0;
}
+static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
+ int ifidx)
+{
+ bool (*matchfn)(struct sk_buff *, void *) = NULL;
+ struct sk_buff *skb;
+ int prec;
+ u32 hslot;
+
+ if (ifidx != -1)
+ matchfn = brcmf_fws_ifidx_match;
+ for (prec = 0; prec < q->num_prec; prec++) {
+ skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
+ while (skb) {
+ hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
+ brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
+ true);
+ brcmu_pkt_buf_free_skb(skb);
+ skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
+ }
+ }
+}
+
static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
u32 slot_id)
{
@@ -2174,6 +2178,8 @@ void brcmf_fws_del_interface(struct brcm
brcmf_fws_lock(fws);
ifp->fws_desc = NULL;
brcmf_dbg(TRACE, "deleting %s\n", entry->name);
+ brcmf_fws_macdesc_cleanup(fws, &fws->desc.iface[ifp->ifidx],
+ ifp->ifidx);
brcmf_fws_macdesc_deinit(entry);
brcmf_fws_cleanup(fws, ifp->ifidx);
brcmf_fws_unlock(fws);

217
package/kernel/mac80211/patches/341-v5.2-0002-brcmfmac-fix-NULL-pointer-derefence-during-USB-disco.patch Normal file
View File

@ -0,0 +1,217 @@
From 5cdb0ef6144f47440850553579aa923c20a63f23 Mon Sep 17 00:00:00 2001
From: Piotr Figiel <p.figiel@camlintechnologies.com>
Date: Mon, 4 Mar 2019 15:42:52 +0000
Subject: [PATCH] brcmfmac: fix NULL pointer derefence during USB disconnect
In case USB disconnect happens at the moment transmitting workqueue is in
progress the underlying interface may be gone causing a NULL pointer
dereference. Add synchronization of the workqueue destruction with the
detach implementation in core so that the transmitting workqueue is stopped
during detach before the interfaces are removed.
Fix following Oops:
Unable to handle kernel NULL pointer dereference at virtual address 00000008
pgd = 9e6a802d
[00000008] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in: nf_log_ipv4 nf_log_common xt_LOG xt_limit iptable_mangle
xt_connmark xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
iptable_filter ip_tables x_tables usb_f_mass_storage usb_f_rndis u_ether
usb_serial_simple usbserial cdc_acm brcmfmac brcmutil smsc95xx usbnet
ci_hdrc_imx ci_hdrc ulpi usbmisc_imx 8250_exar 8250_pci 8250 8250_base
libcomposite configfs udc_core
CPU: 0 PID: 7 Comm: kworker/u8:0 Not tainted 4.19.23-00076-g03740aa-dirty #102
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
Workqueue: brcmf_fws_wq brcmf_fws_dequeue_worker [brcmfmac]
PC is at brcmf_txfinalize+0x34/0x90 [brcmfmac]
LR is at brcmf_fws_dequeue_worker+0x218/0x33c [brcmfmac]
pc : [<7f0dee64>] lr : [<7f0e4140>] psr: 60010093
sp : ee8abef0 ip : 00000000 fp : edf38000
r10: ffffffed r9 : edf38970 r8 : edf38004
r7 : edf3e970 r6 : 00000000 r5 : ede69000 r4 : 00000000
r3 : 00000a97 r2 : 00000000 r1 : 0000888e r0 : ede69000
Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c5387d Table: 7d03c04a DAC: 00000051
Process kworker/u8:0 (pid: 7, stack limit = 0x24ec3e04)
Stack: (0xee8abef0 to 0xee8ac000)
bee0: ede69000 00000000 ed56c3e0 7f0e4140
bf00: 00000001 00000000 edf38004 edf3e99c ed56c3e0 80d03d00 edfea43a edf3e970
bf20: ee809880 ee804200 ee971100 00000000 edf3e974 00000000 ee804200 80135a70
bf40: 80d03d00 ee804218 ee809880 ee809894 ee804200 80d03d00 ee804218 ee8aa000
bf60: 00000088 80135d5c 00000000 ee829f00 ee829dc0 00000000 ee809880 80135d30
bf80: ee829f1c ee873eac 00000000 8013b1a0 ee829dc0 8013b07c 00000000 00000000
bfa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[<7f0dee64>] (brcmf_txfinalize [brcmfmac]) from [<7f0e4140>] (brcmf_fws_dequeue_worker+0x218/0x33c [brcmfmac])
[<7f0e4140>] (brcmf_fws_dequeue_worker [brcmfmac]) from [<80135a70>] (process_one_work+0x138/0x3f8)
[<80135a70>] (process_one_work) from [<80135d5c>] (worker_thread+0x2c/0x554)
[<80135d5c>] (worker_thread) from [<8013b1a0>] (kthread+0x124/0x154)
[<8013b1a0>] (kthread) from [<801010e8>] (ret_from_fork+0x14/0x2c)
Exception stack(0xee8abfb0 to 0xee8abff8)
bfa0: 00000000 00000000 00000000 00000000
bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfe0: 00000000 00000000 00000000 00000000 00000013 00000000
Code: e1530001 0a000007 e3560000 e1a00005 (05942008)
---[ end trace 079239dd31c86e90 ]---
Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../wireless/broadcom/brcm80211/brcmfmac/bcdc.c | 11 +++++++++--
.../wireless/broadcom/brcm80211/brcmfmac/bcdc.h | 6 ++++--
.../wireless/broadcom/brcm80211/brcmfmac/core.c | 4 +++-
.../broadcom/brcm80211/brcmfmac/fwsignal.c | 16 ++++++++++++----
.../broadcom/brcm80211/brcmfmac/fwsignal.h | 3 ++-
.../wireless/broadcom/brcm80211/brcmfmac/proto.c | 10 ++++++++--
.../wireless/broadcom/brcm80211/brcmfmac/proto.h | 3 ++-
7 files changed, 40 insertions(+), 13 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c
@@ -479,11 +479,18 @@ fail:
return -ENOMEM;
}
-void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr)
+void brcmf_proto_bcdc_detach_pre_delif(struct brcmf_pub *drvr)
+{
+ struct brcmf_bcdc *bcdc = drvr->proto->pd;
+
+ brcmf_fws_detach_pre_delif(bcdc->fws);
+}
+
+void brcmf_proto_bcdc_detach_post_delif(struct brcmf_pub *drvr)
{
struct brcmf_bcdc *bcdc = drvr->proto->pd;
drvr->proto->pd = NULL;
- brcmf_fws_detach(bcdc->fws);
+ brcmf_fws_detach_post_delif(bcdc->fws);
kfree(bcdc);
}
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.h
@@ -18,14 +18,16 @@
#ifdef CPTCFG_BRCMFMAC_PROTO_BCDC
int brcmf_proto_bcdc_attach(struct brcmf_pub *drvr);
-void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr);
+void brcmf_proto_bcdc_detach_pre_delif(struct brcmf_pub *drvr);
+void brcmf_proto_bcdc_detach_post_delif(struct brcmf_pub *drvr);
void brcmf_proto_bcdc_txflowblock(struct device *dev, bool state);
void brcmf_proto_bcdc_txcomplete(struct device *dev, struct sk_buff *txp,
bool success);
struct brcmf_fws_info *drvr_to_fws(struct brcmf_pub *drvr);
#else
static inline int brcmf_proto_bcdc_attach(struct brcmf_pub *drvr) { return 0; }
-static inline void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr) {}
+static void brcmf_proto_bcdc_detach_pre_delif(struct brcmf_pub *drvr) {};
+static inline void brcmf_proto_bcdc_detach_post_delif(struct brcmf_pub *drvr) {}
#endif
#endif /* BRCMFMAC_BCDC_H */
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
@@ -1290,6 +1290,8 @@ void brcmf_detach(struct device *dev)
brcmf_bus_change_state(bus_if, BRCMF_BUS_DOWN);
+ brcmf_proto_detach_pre_delif(drvr);
+
/* make sure primary interface removed last */
for (i = BRCMF_MAX_IFS-1; i > -1; i--)
brcmf_remove_interface(drvr->iflist[i], false);
@@ -1299,7 +1301,7 @@ void brcmf_detach(struct device *dev)
brcmf_bus_stop(drvr->bus_if);
- brcmf_proto_detach(drvr);
+ brcmf_proto_detach_post_delif(drvr);
brcmf_debug_detach(drvr);
bus_if->drvr = NULL;
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
@@ -2420,17 +2420,25 @@ struct brcmf_fws_info *brcmf_fws_attach(
return fws;
fail:
- brcmf_fws_detach(fws);
+ brcmf_fws_detach_pre_delif(fws);
+ brcmf_fws_detach_post_delif(fws);
return ERR_PTR(rc);
}
-void brcmf_fws_detach(struct brcmf_fws_info *fws)
+void brcmf_fws_detach_pre_delif(struct brcmf_fws_info *fws)
{
if (!fws)
return;
-
- if (fws->fws_wq)
+ if (fws->fws_wq) {
destroy_workqueue(fws->fws_wq);
+ fws->fws_wq = NULL;
+ }
+}
+
+void brcmf_fws_detach_post_delif(struct brcmf_fws_info *fws)
+{
+ if (!fws)
+ return;
/* cleanup */
brcmf_fws_lock(fws);
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.h
@@ -19,7 +19,8 @@
#define FWSIGNAL_H_
struct brcmf_fws_info *brcmf_fws_attach(struct brcmf_pub *drvr);
-void brcmf_fws_detach(struct brcmf_fws_info *fws);
+void brcmf_fws_detach_pre_delif(struct brcmf_fws_info *fws);
+void brcmf_fws_detach_post_delif(struct brcmf_fws_info *fws);
bool brcmf_fws_queue_skbs(struct brcmf_fws_info *fws);
bool brcmf_fws_fc_active(struct brcmf_fws_info *fws);
void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb);
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/proto.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/proto.c
@@ -66,16 +66,22 @@ fail:
return -ENOMEM;
}
-void brcmf_proto_detach(struct brcmf_pub *drvr)
+void brcmf_proto_detach_post_delif(struct brcmf_pub *drvr)
{
brcmf_dbg(TRACE, "Enter\n");
if (drvr->proto) {
if (drvr->bus_if->proto_type == BRCMF_PROTO_BCDC)
- brcmf_proto_bcdc_detach(drvr);
+ brcmf_proto_bcdc_detach_post_delif(drvr);
else if (drvr->bus_if->proto_type == BRCMF_PROTO_MSGBUF)
brcmf_proto_msgbuf_detach(drvr);
kfree(drvr->proto);
drvr->proto = NULL;
}
}
+
+void brcmf_proto_detach_pre_delif(struct brcmf_pub *drvr)
+{
+ if (drvr->proto && drvr->bus_if->proto_type == BRCMF_PROTO_BCDC)
+ brcmf_proto_bcdc_detach_pre_delif(drvr);
+}
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/proto.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/proto.h
@@ -53,7 +53,8 @@ struct brcmf_proto {
int brcmf_proto_attach(struct brcmf_pub *drvr);
-void brcmf_proto_detach(struct brcmf_pub *drvr);
+void brcmf_proto_detach_pre_delif(struct brcmf_pub *drvr);
+void brcmf_proto_detach_post_delif(struct brcmf_pub *drvr);
static inline int brcmf_proto_hdrpull(struct brcmf_pub *drvr, bool do_fws,
struct sk_buff *skb,

2
package/kernel/mac80211/patches/860-brcmfmac-register-wiphy-s-during-module_init.patch
View File

@ -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
@@ -1377,6 +1377,7 @@ int __init brcmf_core_init(void)
@@ -1379,6 +1379,7 @@ int __init brcmf_core_init(void)
{
if (!schedule_work(&brcmf_driver_work))
return -EBUSY;