tree 0cb89fc9b4609734e783e0c0d1cf4299a0878e92
parent 9c3013e9b91ad23ecae88e45405e98208cce455d
author Jan Andersson <jan@gaisler.com> 1189549410 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1189556479 -0700

spi_mpc83xx: hang fix

When the spi_mpc83xx driver receives a tx_buf pointer which is NULL, it
only writes one zero filled word to the transmit register.  If the driver
expects to receive more than one word it will wait forever for a second
receive interrupt.  With this patch the controller will shift out zeroes
until all words have been received.

Signed-off-by: Jan Andersson <jan@gaisler.com>
Tested-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>