net: ena: fix crash during failed resume from hibernation
authorArthur Kiyanovski <akiyano@amazon.com>
Mon, 19 Nov 2018 10:05:20 +0000 (12:05 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 19 Nov 2018 23:13:00 +0000 (15:13 -0800)
commite76ad21d070f79e566ac46ce0b0584c3c93e1b43
tree37c411c88ea67b211214df5cfc4fe495b7ee68f6
parente1e46479847e66f78f79d8c24d5169a5954b3fc2
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: 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>
drivers/net/ethernet/amazon/ena/ena_netdev.c