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[2a0b:f4c0:16c:9::1]) by smtp.gmail.com with ESMTPSA id v19-20020a509553000000b0046cbcc86bdesm18788515eda.7.2023.01.21.02.09.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 21 Jan 2023 02:09:19 -0800 (PST) From: persmule@gmail.com X-Google-Original-From: equu@openmail.cc To: lpieralisi@kernel.org, toke@toke.dk, kvalo@kernel.org Cc: linux-pci@vger.kernel.org, robh@kernel.org, linux-wireless@vger.kernel.org, ath10k@lists.infradead.org, equu@openmail.cc Subject: [PATCH 3/3] wifi: ath10k: only load compatible DT cal data Date: Sat, 21 Jan 2023 18:06:09 +0800 Message-Id: <20230121100609.1502170-1-equu@openmail.cc> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230121_020925_008042_D3BB9216 X-CRM114-Status: GOOD ( 17.07 ) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" Errors-To: ath10k-bounces+ath10k=archiver.kernel.org@lists.infradead.org From: Edward Chow ath10k might also be sensitive to the issue reported on https://github.com/openwrt/openwrt/pull/11345 , loading calibration data from a device tree node declared incompatible. ath10k will first check whether the device tree node is compatible with it, using the functionality introduced with the first patch of this series, ("PCI: of: Match pci devices or drivers against OF DT nodes") and only proceed loading calibration data from compatible node. Signed-off-by: Edward Chow --- drivers/net/wireless/ath/ath10k/core.c | 28 ++++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/pci.c | 2 +- drivers/net/wireless/ath/ath10k/pci.h | 2 ++ 3 files changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 5eb131ab916f..e4d7ec7f3b59 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -26,6 +26,7 @@ #include "testmode.h" #include "wmi-ops.h" #include "coredump.h" +#include "pci.h" unsigned int ath10k_debug_mask; EXPORT_SYMBOL(ath10k_debug_mask); @@ -1958,6 +1959,33 @@ static int ath10k_download_cal_nvmem(struct ath10k *ar, const char *cell_name) size_t len; int ret; + /* devm_nvmem_cell_get() will get a cell first from the OF + * DT node representing the given device with nvmem-cell-name + * "calibration", and from the global lookup table as a fallback, + * and an ath9k device could be either a pci one or a platform one. + * + * If the OF DT node is not compatible with the real device, the + * calibration data got from the node should not be applied. + * + * dev_is_pci(ar->dev) && ( no OF node || caldata not from node + * || not compatible ) -> do not use caldata . + * + * !dev_is_pci(ar->dev) -> always use caldata . + * + * The judgement for compatibility differs with ath9k for many + * DT using "qcom,ath10k" as compatibility string. + */ + if (dev_is_pci(ar->dev) && + (!ar->dev->of_node || + (of_property_match_string(ar->dev->of_node, + "nvmem-cell-names", + cell_name) < 0) || + !of_device_is_compatible(ar->dev->of_node, + "qcom,ath10k") || + !of_pci_node_match_device(ar->dev->of_node, + &ath10k_pci_driver))) + return ERR_PTR(-ENOENT); + cell = devm_nvmem_cell_get(ar->dev, cell_name); if (IS_ERR(cell)) { ret = PTR_ERR(cell); diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 728d607289c3..5d9f6046f8cf 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -3780,7 +3780,7 @@ static SIMPLE_DEV_PM_OPS(ath10k_pci_pm_ops, ath10k_pci_pm_suspend, ath10k_pci_pm_resume); -static struct pci_driver ath10k_pci_driver = { +struct pci_driver ath10k_pci_driver = { .name = "ath10k_pci", .id_table = ath10k_pci_id_table, .probe = ath10k_pci_probe, diff --git a/drivers/net/wireless/ath/ath10k/pci.h b/drivers/net/wireless/ath/ath10k/pci.h index 480cd97ab739..de676797b736 100644 --- a/drivers/net/wireless/ath/ath10k/pci.h +++ b/drivers/net/wireless/ath/ath10k/pci.h @@ -209,6 +209,8 @@ static inline struct ath10k_pci *ath10k_pci_priv(struct ath10k *ar) #define DIAG_ACCESS_CE_TIMEOUT_US 10000 /* 10 ms */ #define DIAG_ACCESS_CE_WAIT_US 50 +extern struct pci_driver ath10k_pci_driver; + void ath10k_pci_write32(struct ath10k *ar, u32 offset, u32 value); void ath10k_pci_soc_write32(struct ath10k *ar, u32 addr, u32 val); void ath10k_pci_reg_write32(struct ath10k *ar, u32 addr, u32 val); -- 2.39.0 _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k