Hi all,
I’m trying to change txpower with iw. Using AR9580 HW + ath9k driver
with Kernel 4.1.6.
The call fails in mac80211 with the following error: "Failed
check-sdata-in-driver check, flags: 0x0".
stack:
--------------------------------- start stack
----------------------------------------
[44387.506210] WARNING: CPU: 2 PID: 19731 at
net/mac80211/driver-ops.h:12
ieee80211_bss_info_change_notify+0x1d2/0x1e0 [mac80211]()
[44387.506211] wlp2s0: Failed check-sdata-in-driver check, flags: 0x0
[44387.506212] Modules linked in: ath9k(OE) ath9k_common(OE)
ath9k_hw(OE) ath(OE) mac80211 cfg80211 rfkill nfsv3 rpcsec_gss_krb5
nfsv4 dns_resolver nfs fscache xt_CHECKSUM iptable_mangle xt_conntrack
ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4
nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype tun br_netfilter nf_nat
nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data
dm_bio_prison libcrc32c loop arc4 intel_rapl iosf_mbi
x86_pkg_temp_thermal coretemp kvm_intel kvm snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic crct10dif_pclmul
snd_soc_rt5640 snd_hda_intel crc32_pclmul snd_soc_rl6231
snd_hda_controller crc32c_intel snd_soc_core snd_hda_codec
ghash_clmulni_intel snd_hda_core snd_compress snd_pcm_dmaengine
snd_hwdep snd_seq iTCO_wdt iTCO_vendor_support snd_seq_device
[44387.506241] ir_lirc_codec lirc_dev ir_xmp_decoder
ir_mce_kbd_decoder ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder
ir_jvc_decoder ir_nec_decoder ir_rc6_decoder ir_rc5_decoder rc_rc6_mce
snd_pcm nuvoton_cir tpm_tis dw_dmac i2c_hid regmap_i2c tpm rc_core
dw_dmac_core snd_timer i2c_designware_platform i2c_i801
i2c_designware_core snd_soc_sst_acpi snd lpc_ich soundcore shpchp
mfd_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc i915 i2c_algo_bit
drm_kms_helper e1000e drm ptp pps_core sdhci_acpi sdhci mmc_core video
[last unloaded: rfkill]
[44387.506264] CPU: 2 PID: 19731 Comm: iwconfig Tainted: G W
OE 4.1.6-100.fc21.x86_64 #1
WYLPT10H.86A.0035.2015.0126.1814 01/26/2015
[44387.506267] 0000000000000000 00000000a8ea5b62 ffff8800942cbb58
ffffffff817940d5
[44387.506269] 0000000000000000 ffff8800942cbbb0 ffff8800942cbb98
ffffffff810a163a
[44387.506270] ffff8800942cbc20 ffff8800d49b2840 0000000000000001
ffff8801c92c86a0
[44387.506272] Call Trace:
[44387.506278] [<ffffffff817940d5>] dump_stack+0x45/0x57
[44387.506281] [<ffffffff810a163a>] warn_slowpath_common+0x8a/0xc0
[44387.506283] [<ffffffff810a16c5>] warn_slowpath_fmt+0x55/0x70
[44387.506286] [<ffffffff8177f3e0>] ? iw_handler_get_private+0x70/0x70
[44387.506293] [<ffffffffa095fe32>]
ieee80211_bss_info_change_notify+0x1d2/0x1e0 [mac80211]
[44387.506300] [<ffffffffa0975005>]
ieee80211_recalc_txpower+0x35/0x40 [mac80211]
[44387.506309] [<ffffffffa097d08c>] ieee80211_set_tx_power+0x4c/0x1b0
[mac80211]
[44387.506320] [<ffffffffa075684f>]
cfg80211_wext_siwtxpower+0x9f/0x1c0 [cfg80211]
[44387.506334] [<ffffffff8177e672>] ioctl_standard_call+0x52/0xe0
[44387.506336] [<ffffffff8177f3e0>] ? iw_handler_get_private+0x70/0x70
[44387.506340] [<ffffffff8177e620>] ? ioctl_standard_iw_point+0x390/0x390
[44387.506342] [<ffffffff8177dcae>] wireless_process_ioctl+0x17e/0x1d0
[44387.506345] [<ffffffff8177e918>] wext_handle_ioctl+0x78/0xe0
[44387.506348] [<ffffffff81693443>] dev_ioctl+0x2c3/0x5d0
[44387.506353] [<ffffffff811dd8df>] ? handle_mm_fault+0x117f/0x17f0
[44387.506356] [<ffffffff8166045c>] ? sk_prot_alloc+0xdc/0x180
[44387.506359] [<ffffffff8165b472>] sock_ioctl+0x132/0x2c0
[44387.506362] [<ffffffff81241e9e>] ? __d_instantiate+0x9e/0x100
[44387.506365] [<ffffffff8123d398>] do_vfs_ioctl+0x2f8/0x500
[44387.506369] [<ffffffff81068cc1>] ? __do_page_fault+0x1c1/0x450
[44387.506372] [<ffffffff8123d621>] SyS_ioctl+0x81/0xa0
[44387.506375] [<ffffffff81068f7f>] ? do_page_fault+0x2f/0x80
[44387.506378] [<ffffffff8179a9ae>] system_call_fastpath+0x12/0x71
[44387.506380] ---[ end trace de552a3121eef335 ]---
--------------------------------------- end stack
-----------------------------------------------------------
The call in driver-ops.h:check_sdata_in_driver() fails:
static inline bool check_sdata_in_driver(struct ieee80211_sub_if_data *sdata)
{
return !WARN(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER),
"%s: Failed
check-sdata-in-driver check, flags: 0x%x\n",
sdata->dev ? sdata->dev->name :
sdata->name, sdata->flags);
}
AFAIU, this should not happen.
ath9k_add_interface is being called before trying to set txpower. I verified it.
When ath9k_add_interface returns, driver-ops.h:drv_add_interface()
should set SDATA_IN_DRIVER flag.
Any idea why the sdata->flags would still show up with 0x0 in the
above function ?
Thank you,
Kobi
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