4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit e76ad21d070f79e566ac46ce0b0584c3c93e1b43 ]
During resume from hibernation if ena_restore_device fails, ena_com_dev_reset() is called, and uses the readless read mechanism, which was already destroyed by the call to ena_com_mmio_reg_read_request_destroy(). This causes a NULL pointer reference.
In this commit we switch the call order of the above two functions to avoid this crash.
Fixes: d7703ddbd7c9 ("net: ena: fix rare bug when failed restart/resume is followed by driver removal") Signed-off-by: Arthur Kiyanovski akiyano@amazon.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index d906293ce07d..4b73131a0f20 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -2627,8 +2627,8 @@ err_device_destroy: ena_com_abort_admin_commands(ena_dev); ena_com_wait_for_abort_completion(ena_dev); ena_com_admin_destroy(ena_dev); - ena_com_mmio_reg_read_request_destroy(ena_dev); ena_com_dev_reset(ena_dev, ENA_REGS_RESET_DRIVER_INVALID_STATE); + ena_com_mmio_reg_read_request_destroy(ena_dev); err: clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags); clear_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);