null TTY error

["kjlin" <kj.lin@viditec-netmedia.com.tw>]

Hi all,

 

Porting the kernel 2.4.1 to my MIPS embedded board,

i encountered a TTY problem.

When the printf is putted in a large loop, such as a 100 times loop,

the kernel error message "Warning: null TTY for (ff:ff) in tty_write" appears.

However, if just one or two printf are used, everything is fine.

Does this problem concern with my serial driver?

I wrote my serial driver based on driver/char/serial.c.

Can someone give me a hint that where should be checked over?

 

Thanks.