Dongdong Deng 22580f894a drivers/net: fixed drivers that support netpoll use ndo_start_xmit() ... The NETPOLL API requires that interrupts remain disabled in netpoll_send_skb(). The use of spin_lock_irq() and spin_unlock_irq() in the NETPOLL API callbacks causes the interrupts to get enabled and can lead to kernel instability. The solution is to use spin_lock_irqsave() and spin_unlock_restore() to prevent the irqs from getting enabled while in netpoll_send_skb(). Call trace: netpoll_send_skb() { -> local_irq_save(flags) ---> dev->ndo_start_xmit(skb, dev) ---> spin_lock_irq() ---> spin_unlock_irq() *******here would enable the interrupt. ... -> local_irq_restore(flags) } Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Bruce Ashfield <bruce.ashfield@windriver.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-08-14 16:41:16 -07:00
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21142.c
de4x5.c	tulip: Read buffer overflow	2009-08-02 12:20:38 -07:00
de4x5.h
de2104x.c	Remove multiple KERN_ prefixes from printk formats	2009-07-08 10:30:03 -07:00
dmfe.c	net: use symbolic values for ndo_start_xmit() return codes	2009-06-13 01:18:50 -07:00
eeprom.c
interrupt.c
Kconfig
Makefile
media.c
pnic2.c
pnic.c
timer.c
tulip_core.c	drivers/net: fixed drivers that support netpoll use ndo_start_xmit()	2009-08-14 16:41:16 -07:00
tulip.h
uli526x.c	net: use symbolic values for ndo_start_xmit() return codes	2009-06-13 01:18:50 -07:00
winbond-840.c	Remove multiple KERN_ prefixes from printk formats	2009-07-08 10:30:03 -07:00
xircom_cb.c