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

Mohamed Khalfella
2022-05-09T18:15:16Z

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@vger.kernel.org
Reported-by: Meeta Saggi <msaggi@purestorage.com>
Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
Reviewed-by: Meeta Saggi <msaggi@purestorage.com>
Reviewed-by: Eric Badger <ebadger@purestorage.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