PCI/DPC: Log AER error info for DPC/EDR uncorrectable errors

aer_print_error() skips printing if ratelimit_print[i] is not set.  In the
native AER path, ratelimit_print is initialized by add_error_device()
during source device discovery, and is set to 1 for fatal errors to bypass
rate limiting since fatal errors should always be logged.

The DPC/EDR path uses the DPC-capable port as the error source and reads
its AER uncorrectable error status registers directly in
dpc_get_aer_uncorrect_severity(). Since it does not go through
add_error_device(), ratelimit_print[0] is left uninitialized and zero.  As
a result, aer_print_error() silently drops all AER error messages for
DPC/EDR triggered events.

Set ratelimit_print[0] to 1 to bypass rate limiting and always print AER
logs for uncorrectable errors detected by the DPC port.

Fixes: a57f2bfb4a58 ("PCI/AER: Ratelimit correctable and non-fatal error logging")
Co-developed-by: Goudar Manjunath Ramanagouda <manjunath.ramanagouda.goudar@intel.com>
Signed-off-by: Goudar Manjunath Ramanagouda <manjunath.ramanagouda.goudar@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260318170449.2733581-1-sathyanarayanan.kuppuswamy@linux.intel.com

diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index f028bc795f197bebee9956588591bd1f5bd656d2..2b779bd1d861b6047c1d53a1e88662fdade8413c 100644 (file)
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -256,6 +256,7 @@ static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,
 
        info->dev[0] = dev;
        info->error_dev_num = 1;
+       info->ratelimit_print[0] = 1;
 
        return 1;
 }