From dd1886d42ba7aeb2846436171d90b2b133813edf Mon Sep 17 00:00:00 2001 From: Arthur Kiyanovski Date: Mon, 19 Nov 2018 12:05:20 +0200 Subject: [PATCH] net: ena: fix crash during failed resume from hibernation 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: ab0f371845a7 ("net: ena: fix rare bug when failed restart/resume is followed by driver removal") Signed-off-by: Arthur Kiyanovski Signed-off-by: David S. Miller --- 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 18956e7604a31..1d3cead0977eb 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -2694,8 +2694,8 @@ 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); -- 2.39.5