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PCI/DPC: Print all TLP Prefixes, not just the first 

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: f20c4ea49e ("PCI/DPC: Add eDPC support")
Link: https://lore.kernel.org/r/20240118110815.3867-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
[bhelgaas: add user-visible details to commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Ilpo Järvinen 2024-01-18 13:08:15 +02:00 committed by Bjorn Helgaas
parent 6613476e22
commit 6568d82512
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pcie/dpc.c
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@ -234,7 +234,7 @@ 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: