Re: [BUG/PATCH] : bug in tty_default_put_char()
Jean Tourrilhes (firstname.lastname@example.org)
Mon, 26 Aug 2002 11:59:30 -0700
On Mon, Aug 26, 2002 at 07:57:04PM +0100, Alan Cox wrote:
> On Mon, 2002-08-26 at 19:07, Jean Tourrilhes wrote:
> > Hi,
> > Bug : tty_default_put_char() doesn't check the return value of
> > tty->driver.write(). However, the later may fail if buffers are full.
> > Solution : It's not obvious what should be done. The attached
> > patch is certainly wrong, but gives you an idea of what the problem
> > is.
> Make it an int and return the tty->driver.write value. We know that
> since its void nobody is currently checking the error code, and now they
> can where it matters
Just check drivers/char/n_tty.c for every occurence of
put_char() and be scared. The problem is to find a practical solution.
For myself, I've added some clever workaround in IrCOMM to
accept data before full setup.
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