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d0151c2bad
Brcmfmac got warning message when hitting FW crash in TX throughput test with fcmode=2. It's caused by FMAC flushed TXQ in brcmf_sdio_bus_stop but without doing hanger slot cleanup. Therefore, we move brcmf_remove_interface before brcmf_bus_stop to make sure the hanger slot is clean when flushing TXQ. [ 1891.512234] WARNING: CPU: 1 PID: 2765 at drivers/net/wireless/broadcom/brcm80211/brcmutil/utils.c:49 brcmu_pkt_buf_free_skb+0x21/0x30 [brcmutil] [ 1891.512234] Modules linked in: brcmfmac(OE-) brcmutil(OE) cfg80211(OE) compat(OE) rfkill mmc_block(OE) sdhci_pci(OE) sdhci(OE) mmc_core(OE) ip6table_filter ip6_tables ebtable_nat ebtables dns_resolver fscache e1000e ppdev iTCO_wdt iTCO_vendor_support tpm_tis tpm_tis_core tpm mei_me mei pcspkr lpc_ich i2c_i801 mfd_core ptp pps_core parport_pc parport wmi tcp_bic uinput i915 iosf_mbi i2c_algo_bit drm_kms_helper drm i2c_core video [last unloaded: brcmfmac] [ 1891.512247] CPU: 1 PID: 2765 Comm: rmmod Tainted: G W OE 4.12.0 #1 [ 1891.512247] Hardware name: /DH77EB, BIOS EBH7710H.86A.0100.2013.0312.1351 03/12/2013 [ 1891.512248] task: ffff880118f08000 task.stack: ffffc90001180000 [ 1891.512249] RIP: 0010:brcmu_pkt_buf_free_skb+0x21/0x30 [brcmutil] [ 1891.512249] RSP: 0018:ffffc90001183cc0 EFLAGS: 00010086 [ 1891.512250] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000006 [ 1891.512251] RDX: 0000000000000000 RSI: 0000000000000086 RDI: ffff880118e3ab00 [ 1891.512251] RBP: ffffc90001183cc0 R08: 0000000000000000 R09: 000000000000a050 [ 1891.512252] R10: 0000000000000001 R11: 0000000000aaaaaa R12: 00000000000000bc [ 1891.512253] R13: ffff880118b40c78 R14: 0000000000000002 R15: ffff880118e3ab00 [ 1891.512253] FS: 00007f2a49760740(0000) GS:ffff88011f280000(0000) knlGS:0000000000000000 [ 1891.512254] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1891.512254] CR2: 00000000012994a8 CR3: 000000011a3c4000 CR4: 00000000001406e0 [ 1891.512255] Call Trace: [ 1891.512259] brcmf_fws_cleanup+0x1ea/0x240 [brcmfmac] [ 1891.512264] brcmf_fws_detach+0x42/0x60 [brcmfmac] [ 1891.512268] brcmf_proto_bcdc_detach+0x26/0x40 [brcmfmac] [ 1891.512273] brcmf_proto_detach+0x57/0x70 [brcmfmac] [ 1891.512277] brcmf_detach+0x89/0x100 [brcmfmac] [ 1891.512282] brcmf_sdio_remove+0x76/0x180 [brcmfmac] [ 1891.512286] brcmf_sdiod_remove+0x25/0xb0 [brcmfmac] [ 1891.512291] brcmf_ops_sdio_remove+0xbd/0x120 [brcmfmac] [ 1891.512294] sdio_bus_remove+0x33/0x100 [mmc_core] [ 1891.512295] device_release_driver_internal+0x141/0x200 [ 1891.512297] driver_detach+0x38/0x70 [ 1891.512298] bus_remove_driver+0x55/0xd0 [ 1891.512299] driver_unregister+0x2c/0x50 [ 1891.512303] sdio_unregister_driver+0x1a/0x20 [mmc_core] [ 1891.512307] brcmf_sdio_exit+0x2f/0x40 [brcmfmac] [ 1891.512312] brcmf_core_exit+0x15/0xd7 [brcmfmac] [ 1891.512316] __exit_compat+0x9/0x2b [brcmfmac] [ 1891.512318] SyS_delete_module+0x155/0x230 [ 1891.512319] ? exit_to_usermode_loop+0x70/0x99 [ 1891.512321] do_syscall_64+0x54/0xc0 [ 1891.512322] entry_SYSCALL64_slow_path+0x25/0x25 Signed-off-by: Wright Feng <wright.feng@cypress.com> Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20200928054922.44580-2-wright.feng@cypress.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.