diff options
Diffstat (limited to 'package/kernel/mac80211/patches/ath11k/0028-wifi-ath11k-debugfs-fix-to-work-with-multiple-PCI-de.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/ath11k/0028-wifi-ath11k-debugfs-fix-to-work-with-multiple-PCI-de.patch | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath11k/0028-wifi-ath11k-debugfs-fix-to-work-with-multiple-PCI-de.patch b/package/kernel/mac80211/patches/ath11k/0028-wifi-ath11k-debugfs-fix-to-work-with-multiple-PCI-de.patch new file mode 100644 index 0000000000..225c4b4316 --- /dev/null +++ b/package/kernel/mac80211/patches/ath11k/0028-wifi-ath11k-debugfs-fix-to-work-with-multiple-PCI-de.patch @@ -0,0 +1,139 @@ +From 323d91d4684d238f6bc3693fed93caf795378fe0 Mon Sep 17 00:00:00 2001 +From: Kalle Valo <quic_kvalo@quicinc.com> +Date: Thu, 22 Dec 2022 19:15:59 +0200 +Subject: [PATCH] wifi: ath11k: debugfs: fix to work with multiple PCI devices + +ath11k fails to load if there are multiple ath11k PCI devices with same name: + + ath11k_pci 0000:01:00.0: Hardware name qcn9074 hw1.0 + debugfs: Directory 'ath11k' with parent '/' already present! + ath11k_pci 0000:01:00.0: failed to create ath11k debugfs + ath11k_pci 0000:01:00.0: failed to create soc core: -17 + ath11k_pci 0000:01:00.0: failed to init core: -17 + ath11k_pci: probe of 0000:01:00.0 failed with error -17 + +Fix this by creating a directory for each ath11k device using schema +<bus>-<devname>, for example "pci-0000:06:00.0". This directory created under +the top-level ath11k directory, for example /sys/kernel/debug/ath11k. + +The reference to the toplevel ath11k directory is not stored anymore within ath11k, instead +it's retrieved using debugfs_lookup(). If the directory does not exist it will +be created. After the last directory from the ath11k directory is removed, for +example when doing rmmod ath11k, the empty ath11k directory is left in place, +it's a minor cosmetic issue anyway. + +Here's an example hierarchy with one WCN6855: + +ath11k +`-- pci-0000:06:00.0 + |-- mac0 + | |-- dfs_block_radar_events + | |-- dfs_simulate_radar + | |-- ext_rx_stats + | |-- ext_tx_stats + | |-- fw_dbglog_config + | |-- fw_stats + | | |-- beacon_stats + | | |-- pdev_stats + | | `-- vdev_stats + | |-- htt_stats + | |-- htt_stats_reset + | |-- htt_stats_type + | `-- pktlog_filter + |-- simulate_fw_crash + `-- soc_dp_stats + +I didn't have a test setup where I could connect multiple ath11k devices to the +same the host, so I have only tested this with one device. + +Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.9 +Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.5.0.1-01208-QCAHKSWPL_SILICONZ-1 +Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.5.0.1-01208-QCAHKSWPL_SILICONZ-1 + +Tested-by: Robert Marko <robert.marko@sartura.hr> +Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> +Link: https://lore.kernel.org/r/20221220121231.20120-1-kvalo@kernel.org +--- + drivers/net/wireless/ath/ath11k/core.h | 1 - + drivers/net/wireless/ath/ath11k/debugfs.c | 48 +++++++++++++++++++---- + 2 files changed, 40 insertions(+), 9 deletions(-) + +--- a/drivers/net/wireless/ath/ath11k/core.h ++++ b/drivers/net/wireless/ath/ath11k/core.h +@@ -921,7 +921,6 @@ struct ath11k_base { + enum ath11k_dfs_region dfs_region; + #ifdef CPTCFG_ATH11K_DEBUGFS + struct dentry *debugfs_soc; +- struct dentry *debugfs_ath11k; + #endif + struct ath11k_soc_dp_stats soc_stats; + +--- a/drivers/net/wireless/ath/ath11k/debugfs.c ++++ b/drivers/net/wireless/ath/ath11k/debugfs.c +@@ -976,10 +976,6 @@ int ath11k_debugfs_pdev_create(struct at + if (test_bit(ATH11K_FLAG_REGISTERED, &ab->dev_flags)) + return 0; + +- ab->debugfs_soc = debugfs_create_dir(ab->hw_params.name, ab->debugfs_ath11k); +- if (IS_ERR(ab->debugfs_soc)) +- return PTR_ERR(ab->debugfs_soc); +- + debugfs_create_file("simulate_fw_crash", 0600, ab->debugfs_soc, ab, + &fops_simulate_fw_crash); + +@@ -1001,15 +997,51 @@ void ath11k_debugfs_pdev_destroy(struct + + int ath11k_debugfs_soc_create(struct ath11k_base *ab) + { +- ab->debugfs_ath11k = debugfs_create_dir("ath11k", NULL); ++ struct dentry *root; ++ bool dput_needed; ++ char name[64]; ++ int ret; ++ ++ root = debugfs_lookup("ath11k", NULL); ++ if (!root) { ++ root = debugfs_create_dir("ath11k", NULL); ++ if (IS_ERR_OR_NULL(root)) ++ return PTR_ERR(root); ++ ++ dput_needed = false; ++ } else { ++ /* a dentry from lookup() needs dput() after we don't use it */ ++ dput_needed = true; ++ } ++ ++ scnprintf(name, sizeof(name), "%s-%s", ath11k_bus_str(ab->hif.bus), ++ dev_name(ab->dev)); ++ ++ ab->debugfs_soc = debugfs_create_dir(name, root); ++ if (IS_ERR_OR_NULL(ab->debugfs_soc)) { ++ ret = PTR_ERR(ab->debugfs_soc); ++ goto out; ++ } ++ ++ ret = 0; ++ ++out: ++ if (dput_needed) ++ dput(root); + +- return PTR_ERR_OR_ZERO(ab->debugfs_ath11k); ++ return ret; + } + + void ath11k_debugfs_soc_destroy(struct ath11k_base *ab) + { +- debugfs_remove_recursive(ab->debugfs_ath11k); +- ab->debugfs_ath11k = NULL; ++ debugfs_remove_recursive(ab->debugfs_soc); ++ ab->debugfs_soc = NULL; ++ ++ /* We are not removing ath11k directory on purpose, even if it ++ * would be empty. This simplifies the directory handling and it's ++ * a minor cosmetic issue to leave an empty ath11k directory to ++ * debugfs. ++ */ + } + EXPORT_SYMBOL(ath11k_debugfs_soc_destroy); + |