From: Maciej W. Rozycki Date: Thu, 24 Jul 2008 04:29:49 +0000 (-0700) Subject: serial: DZ11: avoid a hang at console switch-over X-Git-Tag: v2.6.27-rc1~663 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9a8f4d1de12633bfb71b5fee47745b32877b7b5;p=pandora-kernel.git serial: DZ11: avoid a hang at console switch-over Changes to the generic console support code that happened a while ago introduced a scenario where the initial console is used in parallel with the final console during a brief period when switching between the two is in progress. During that time a message about the switch-over is printed. With some combinations of chips, firmware and drivers, such as the DEC DZ11 clone used with the DECstation, a hang may happen because the firmware used for the initial console may not expect the state of the chip after it has been initialised by the driver. This is a workaround for the DZ11 which reuses the power-management callback to keep the transmitter of the line associated with the console enabled. It reflects the consensus reached in a discussion a while ago. Signed-off-by: Maciej W. Rozycki Cc: Jiri Slaby Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed