Jia-Ju Bai 0845d45e90 e1000e: Modify Tx/Rx configurations to avoid null pointer dereferences in e1000_open
When e1000e_setup_rx_resources is failed in e1000_open,
e1000e_free_tx_resources in "err_setup_rx" segment is executed.
"writel(0, tx_ring->head)" statement in e1000_clean_tx_ring
in e1000e_free_tx_resources will cause a null poonter dereference(crash),
because "tx_ring->head" is only assigned in e1000_configure_tx
in e1000_configure, but it is after e1000e_setup_rx_resources.

This patch moves head/tail register writing to e1000_configure_tx/rx,
which can fix this problem. It is inspired by igb_configure_tx_ring
in the igb driver.

Specially, thank Alexander Duyck for his valuable suggestion.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-08-18 14:06:06 -07:00
..
2015-06-10 22:46:34 -07:00
2015-06-26 11:54:29 -07:00
2015-07-17 16:39:53 -07:00
2015-08-01 12:47:04 -07:00
2015-06-13 08:44:14 -07:00
2015-06-26 14:51:15 -07:00
2015-06-23 13:32:38 -07:00
2015-07-23 13:07:04 -07:00
2015-07-02 14:40:49 -07:00
2015-07-24 15:14:04 -06:00
2015-08-13 13:36:22 -07:00