linux-kernel - [PATCH] PCI/AER: Iterate over error counters instead of error strings

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Message-Id: <20220509181441.31884-1-mkhalfella@purestorage.com>
Date:   Mon,  9 May 2022 18:14:41 +0000
From:   Mohamed Khalfella <mkhalfella@...estorage.com>
To:     mkhalfella@...estorage.com
Cc:     stable@...r.kernel.org, Meeta Saggi <msaggi@...estorage.com>,
        Eric Badger <ebadger@...estorage.com>,
        Russell Currey <ruscur@...sell.cc>,
        "Oliver O'Halloran" <oohall@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linuxppc-dev@...ts.ozlabs.org (open list:PCI ENHANCED ERROR HANDLING
        (EEH) FOR POWERPC),
        linux-pci@...r.kernel.org (open list:PCI SUBSYSTEM),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] PCI/AER: Iterate over error counters instead of error strings

PCI AER stats counters sysfs attributes need to iterate over
stats counters instead of stats names. Also, added a build
time check to make sure all counters have entries in strings
array.

Fixes: 0678e3109a3c ("PCI/AER: Simplify __aer_print_error()")
Cc: stable@...r.kernel.org
Reported-by: Meeta Saggi <msaggi@...estorage.com>
Signed-off-by: Mohamed Khalfella <mkhalfella@...estorage.com>
Reviewed-by: Meeta Saggi <msaggi@...estorage.com>
Reviewed-by: Eric Badger <ebadger@...estorage.com>
---
 drivers/pci/pcie/aer.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 9fa1f97e5b27..ce99a6d44786 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -533,7 +533,7 @@ static const char *aer_agent_string[] = {
 	u64 *stats = pdev->aer_stats->stats_array;			\
 	size_t len = 0;							\
 									\
-	for (i = 0; i < ARRAY_SIZE(strings_array); i++) {		\
+	for (i = 0; i < ARRAY_SIZE(pdev->aer_stats->stats_array); i++) {\
 		if (strings_array[i])					\
 			len += sysfs_emit_at(buf, len, "%s %llu\n",	\
 					     strings_array[i],		\
@@ -1342,6 +1342,11 @@ static int aer_probe(struct pcie_device *dev)
 	struct device *device = &dev->device;
 	struct pci_dev *port = dev->port;
 
+	BUILD_BUG_ON(ARRAY_SIZE(aer_correctable_error_string) <
+		     AER_MAX_TYPEOF_COR_ERRS);
+	BUILD_BUG_ON(ARRAY_SIZE(aer_uncorrectable_error_string) <
+		     AER_MAX_TYPEOF_UNCOR_ERRS);
+
 	/* Limit to Root Ports or Root Complex Event Collectors */
 	if ((pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC) &&
 	    (pci_pcie_type(port) != PCI_EXP_TYPE_ROOT_PORT))
-- 
2.29.0