From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from m42-4.mailgun.net ([69.72.42.4]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kfb5h-0000SM-7R for ath11k@lists.infradead.org; Thu, 19 Nov 2020 03:58:38 +0000 From: Anilkumar Kolli Subject: [PATCH] ath11k: add 64bit check before reading msi high addr Date: Thu, 19 Nov 2020 09:28:21 +0530 Message-Id: <1605758301-11249-1-git-send-email-akolli@codeaurora.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath11k" Errors-To: ath11k-bounces+kvalo=adurom.com@lists.infradead.org To: ath11k@lists.infradead.org Cc: Anilkumar Kolli , linux-wireless@vger.kernel.org In QCN9074 ath11k boot, firmware crash is observed in 64-bit builds and is due to wrong 64 bit MSI address size. This patch fixes the firmware crash. Read msi high addr if 64-bit addresses allowed on MSI. Tested-On: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1.r1-00026-QCAHKSWPL_SILICONZ-2 Signed-off-by: Anilkumar Kolli --- drivers/net/wireless/ath/ath11k/pci.c | 11 +++++++++-- drivers/net/wireless/ath/ath11k/pci.h | 1 + 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index b75f47dc36de..54ac0a861063 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -264,13 +264,18 @@ int ath11k_pci_get_msi_irq(struct device *dev, unsigned int vector) static void ath11k_pci_get_msi_address(struct ath11k_base *ab, u32 *msi_addr_lo, u32 *msi_addr_hi) { + struct ath11k_pci *ar_pci = ath11k_pci_priv(ab); struct pci_dev *pci_dev = to_pci_dev(ab->dev); pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_LO, msi_addr_lo); - pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_HI, - msi_addr_hi); + if (test_bit(ATH11K_PCI_FLAG_IS_MSI_64, &ab_pci->flags)) { + pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_HI, + msi_addr_hi); + } else { + *msi_addr_hi = 0; + } } int ath11k_pci_get_user_msi_assignment(struct ath11k_pci *ab_pci, char *user_name, @@ -658,6 +663,8 @@ static int ath11k_pci_enable_msi(struct ath11k_pci *ab_pci) } ab_pci->msi_ep_base_data = msi_desc->msg.data; + if (msi_desc->msi_attrib.is_64) + set_bit(ATH11K_PCI_FLAG_IS_MSI_64, &ab_pci->flags); ath11k_dbg(ab, ATH11K_DBG_PCI, "msi base data is %d\n", ab_pci->msi_ep_base_data); diff --git a/drivers/net/wireless/ath/ath11k/pci.h b/drivers/net/wireless/ath/ath11k/pci.h index 43562f774a37..9c503a17c237 100644 --- a/drivers/net/wireless/ath/ath11k/pci.h +++ b/drivers/net/wireless/ath/ath11k/pci.h @@ -38,6 +38,7 @@ struct ath11k_msi_config { enum ath11k_pci_flags { ATH11K_PCI_FLAG_INIT_DONE, + ATH11K_PCI_FLAG_IS_MSI_64, }; struct ath11k_pci { -- 2.7.4 -- ath11k mailing list ath11k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath11k