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Commit f3f55d83 authored by Keith Busch's avatar Keith Busch Committed by Greg Kroah-Hartman
Browse files

PCI/AER: Take reference on error devices 



[ Upstream commit 60271ab044a53edb9dcbe76bebea2221c4ff04d9 ]

Error handling may be running in parallel with a hot removal.  Reference
count the device during AER handling so the device can not be freed while
AER wants to reference it.

Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarSinan Kaya <okaya@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 40ebd8b3

drivers/pci/pcie/aer.c

+2 −1
Original line number Diff line number Diff line
@@ -866,7 +866,7 @@ void cper_print_aer(struct pci_dev *dev, int aer_severity, 
static int add_error_device(struct aer_err_info *e_info, struct pci_dev *dev)

{

	if (e_info->error_dev_num < AER_MAX_MULTI_ERR_DEVICES) {

		e_info->dev[e_info->error_dev_num] = dev;

		e_info->dev[e_info->error_dev_num] = pci_dev_get(dev);

		e_info->error_dev_num++;

		return 0;

	}
@@ -1013,6 +1013,7 @@ static void handle_error_source(struct pci_dev *dev, struct aer_err_info *info) 
		pcie_do_nonfatal_recovery(dev);

	else if (info->severity == AER_FATAL)

		pcie_do_fatal_recovery(dev, PCIE_PORT_SERVICE_AER);

	pci_dev_put(dev);

}



#ifdef CONFIG_ACPI_APEI_PCIEAER