[PATCH] PCI/AER: Support errors introduced by PCIe r6.0

Lukas Wunner lukas at wunner.de
Wed Aug 27 23:41:09 AEST 2025


PCIe r6.0 defined five additional errors in the Uncorrectable Error
Status, Mask and Severity Registers (PCIe r7.0 sec 7.8.4.2ff).

lspci has been supporting them since commit 144b0911cc0b ("ls-ecaps:
extend decode support for more fields for AER CE and UE status"):

https://git.kernel.org/pub/scm/utils/pciutils/pciutils.git/commit/?id=144b0911cc0b

Amend the AER driver to recognize them as well, instead of logging them as
"Unknown Error Bit".

Signed-off-by: Lukas Wunner <lukas at wunner.de>
Cc: stable at vger.kernel.org
---
Last amendment of aer_uncorrectable_error_string[] was in 2019 for an
error introduced in PCIe r3.1, see commit 6458b438ebc1 ("PCI/AER: Add
PoisonTLPBlocked to Uncorrectable error counters").

 drivers/pci/pcie/aer.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index e286c19..15ed541 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -43,7 +43,7 @@
 #define AER_ERROR_SOURCES_MAX		128
 
 #define AER_MAX_TYPEOF_COR_ERRS		16	/* as per PCI_ERR_COR_STATUS */
-#define AER_MAX_TYPEOF_UNCOR_ERRS	27	/* as per PCI_ERR_UNCOR_STATUS*/
+#define AER_MAX_TYPEOF_UNCOR_ERRS	32	/* as per PCI_ERR_UNCOR_STATUS*/
 
 struct aer_err_source {
 	u32 status;			/* PCI_ERR_ROOT_STATUS */
@@ -525,11 +525,11 @@ void pci_aer_exit(struct pci_dev *dev)
 	"AtomicOpBlocked",		/* Bit Position 24	*/
 	"TLPBlockedErr",		/* Bit Position 25	*/
 	"PoisonTLPBlocked",		/* Bit Position 26	*/
-	NULL,				/* Bit Position 27	*/
-	NULL,				/* Bit Position 28	*/
-	NULL,				/* Bit Position 29	*/
-	NULL,				/* Bit Position 30	*/
-	NULL,				/* Bit Position 31	*/
+	"DMWrReqBlocked",		/* Bit Position 27	*/
+	"IDECheck",			/* Bit Position 28	*/
+	"MisIDETLP",			/* Bit Position 29	*/
+	"PCRC_CHECK",			/* Bit Position 30	*/
+	"TLPXlatBlocked",		/* Bit Position 31	*/
 };
 
 static const char *aer_agent_string[] = {
-- 
2.47.2



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