tree 56a73537ec1111098f785ef26e4aa7a2e6bdd1f2
parent 715fe7af9fd7328af661742bfadc195e665a837f
author Alan Cox <alan@linux.intel.com> 1243515695 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1243611758 -0700

8250: Fix oops from setserial

If you setserial a port which has never been initialised we change the type
but don't update the I/O method pointers. The same problem is true if you
change the io type of a port - but nobody ever does that so nobody noticed!

Remember the old type and when attaching if the type has changed reload the
port accessor pointers. We can't do it blindly as some 8250 drivers load custom
accessors and we must not stomp those.

Tested-by: Victor Seryodkin <vvscore@gmail.com>
Closes-bug: #13367
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>