From 87658f16082bd4a0d2c09731fd6c0f171e708b8a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Thu, 18 Jan 2024 13:08:15 +0200 Subject: [PATCH] PCI/DPC: Print all TLP Prefixes, not just the first MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ Upstream commit 6568d82512b0a64809acff3d7a747362fa4288c8 ] The TLP Prefix Log Register consists of multiple DWORDs (PCIe r6.1 sec 7.9.14.13) but the loop in dpc_process_rp_pio_error() keeps reading from the first DWORD, so we print only the first PIO TLP Prefix (duplicated several times), and we never print the second, third, etc., Prefixes. Add the iteration count based offset calculation into the config read. Fixes: f20c4ea49ec4 ("PCI/DPC: Add eDPC support") Link: https://lore.kernel.org/r/20240118110815.3867-1-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen [bhelgaas: add user-visible details to commit log] Signed-off-by: Bjorn Helgaas Signed-off-by: Sasha Levin --- drivers/pci/pcie/dpc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index f21d64ae4ffc..cf0d4ba2e157 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -231,7 +231,7 @@ static void dpc_process_rp_pio_error(struct pci_dev *pdev) for (i = 0; i < pdev->dpc_rp_log_size - 5; i++) { pci_read_config_dword(pdev, - cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, &prefix); + cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG + i * 4, &prefix); pci_err(pdev, "TLP Prefix Header: dw%d, %#010x\n", i, prefix); } clear_status: