Potential bugs found in 8139too

Potential bugs found in 8139too

[Jia-Ju Bai]

Recently I test linux device drivers 3.17.2, and find some potential bugs.

The target file is drivers/net/ethernet/realtek/8139too.c, which is used to
build 8139too.ko. I hope you can help me check my findings:
[1] In the normal process of 8139too, netif_napi_add is called in
rtl8139_init_one, but netif_napi_del is not called in rtl8139_remove_one.
However, many other ethernet card drivers call them in pairs, even in the
error handling paths, such as r8169 and igb.
[2] In the normal process of 8139too, pci_enable_device and
pci_disable_device are called in pairs in rtl8139_init_board(in
rtl8139_init_one) and rtl8139_remove_one. However, when pci_enable_device
has been called and pci_request_regions is failed in rtl8139_init_board,
"err_out" segment in rtl8139_init_board is executed immediately to exit, but
pci_disable_device is not called because "disable_dev_on_err = 0".

Could you help me check these findings? Thank you very much, and I'm looking
forward to your reply.

--
Jia-Ju Bai