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HELP - null pointer deference error while opening device

Posted by prat0318 
while opening a device as
fd = open ("/dev/ttyUSB0",O_RDONLY);

it shows seg fault...with error unable to handle kernel null pointer dereference.

I am running Montavista Linux 2.4 on a palmtop.
Any kinda help will be appreciated.

Thanks smiling smiley
Prateek.
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