Re: [PATCH] wifi: ath11k: Trigger sta disconnect on hardware restart
From: Kalle Valo
Date: Wed Nov 02 2022 - 13:02:11 EST
Youghandhar Chintala <quic_youghand@xxxxxxxxxxx> wrote:
> Currently after the hardware restart triggered from the driver, the
> station interface connection remains intact, since a disconnect trigger
> is not sent to userspace. This can lead to a problem in targets where
> the wifi mac sequence is added by the firmware.
>
> After the target restart, its wifi mac sequence number gets reset to
> zero. Hence AP to which our device is connected will receive frames with
> a wifi mac sequence number jump to the past, thereby resulting in the
> AP dropping all these frames, until the frame arrives with a wifi mac
> sequence number which AP was expecting.
>
> To avoid such frame drops, its better to trigger a station disconnect
> upon target hardware restart which can be done with API
> ieee80211_reconfig_disconnect exposed to mac80211.
>
> The other targets are not affected by this change, since the hardware
> params flag is not set.
>
> Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1
>
> Signed-off-by: Youghandhar Chintala <quic_youghand@xxxxxxxxxxx>
Fails to compile:
In file included from ./include/linux/wait.h:7,
from ./include/linux/wait_bit.h:8,
from ./include/linux/fs.h:6,
from ./include/linux/highmem.h:5,
from ./include/linux/bvec.h:10,
from ./include/linux/skbuff.h:17,
from ./include/linux/if_ether.h:19,
from ./include/net/mac80211.h:18,
from drivers/net/wireless/ath/ath11k/mac.c:7:
drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_mac_op_reconfig_complete':
drivers/net/wireless/ath/ath11k/mac.c:8049:45: error: 'arvif' undeclared (first use in this function)
8049 | list_for_each_entry(arvif, &ar->arvifs, list) {
| ^~~~~
./include/linux/list.h:674:14: note: in definition of macro 'list_for_each_entry'
674 | for (pos = list_first_entry(head, typeof(*pos), member); \
| ^~~
drivers/net/wireless/ath/ath11k/mac.c:8049:45: note: each undeclared identifier is reported only once for each function it appears in
8049 | list_for_each_entry(arvif, &ar->arvifs, list) {
| ^~~~~
./include/linux/list.h:674:14: note: in definition of macro 'list_for_each_entry'
674 | for (pos = list_first_entry(head, typeof(*pos), member); \
| ^~~
In file included from ./include/linux/bits.h:22,
from ./include/linux/ratelimit_types.h:5,
from ./include/linux/printk.h:9,
from ./include/asm-generic/bug.h:22,
from ./arch/x86/include/asm/bug.h:87,
from ./include/linux/bug.h:5,
from ./include/net/mac80211.h:16:
././include/linux/compiler_types.h:298:27: error: expression in static assertion is not an integer
298 | #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
./include/linux/container_of.h:19:9: note: in expansion of macro 'static_assert'
19 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
./include/linux/container_of.h:19:23: note: in expansion of macro '__same_type'
19 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~
./include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
./include/linux/list.h:531:9: note: in expansion of macro 'list_entry'
531 | list_entry((ptr)->next, type, member)
| ^~~~~~~~~~
./include/linux/list.h:674:20: note: in expansion of macro 'list_first_entry'
674 | for (pos = list_first_entry(head, typeof(*pos), member); \
| ^~~~~~~~~~~~~~~~
drivers/net/wireless/ath/ath11k/mac.c:8049:25: note: in expansion of macro 'list_for_each_entry'
8049 | list_for_each_entry(arvif, &ar->arvifs, list) {
| ^~~~~~~~~~~~~~~~~~~
././include/linux/compiler_types.h:298:27: error: expression in static assertion is not an integer
298 | #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
./include/linux/container_of.h:19:9: note: in expansion of macro 'static_assert'
19 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
./include/linux/container_of.h:19:23: note: in expansion of macro '__same_type'
19 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~
./include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
./include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
./include/linux/list.h:676:20: note: in expansion of macro 'list_next_entry'
676 | pos = list_next_entry(pos, member))
| ^~~~~~~~~~~~~~~
drivers/net/wireless/ath/ath11k/mac.c:8049:25: note: in expansion of macro 'list_for_each_entry'
8049 | list_for_each_entry(arvif, &ar->arvifs, list) {
| ^~~~~~~~~~~~~~~~~~~
make[6]: *** [scripts/Makefile.build:250: drivers/net/wireless/ath/ath11k/mac.o] Error 1
make[5]: *** [scripts/Makefile.build:500: drivers/net/wireless/ath/ath11k] Error 2
make[4]: *** [scripts/Makefile.build:500: drivers/net/wireless/ath] Error 2
make[3]: *** [scripts/Makefile.build:500: drivers/net/wireless] Error 2
make[2]: *** [scripts/Makefile.build:500: drivers/net] Error 2
make[1]: *** [scripts/Makefile.build:500: drivers] Error 2
make: *** [Makefile:1992: .] Error 2
Patch set to Changes Requested.
--
https://patchwork.kernel.org/project/linux-wireless/patch/20221102061423.1032-1-quic_youghand@xxxxxxxxxxx/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches