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Message-Id: <200802051402.26816.rick@microway.com> Date: Tue, 5 Feb 2008 14:02:26 -0500 From: Rick Warner <rick@...roway.com> To: linux-kernel@...r.kernel.org Subject: serial port regression caused by "Char: tty_ioctl, use wait_event_interruptible_timeout" patch Hello all, My company uses a proprietary hardware monitoring solution that utilizes communication over the serial port. A RS232-RS485 converter is plugged into the serial port of the master of a cluster, and cat5 cables are daisy chained between the cards to handle out of band hardware monitoring. The cards themselves speak RS485. We have been using the same software to read the data from the serial port since the 2.4 kernel days. As of 2.6.23, the software no longer works. I narrowed down the problem doing a binary search on git snapshots between .22 and .23, and found the breakage between git6 and git7. Further isolating it found the patch mentioned in the subject to be the cause. I reversed the patch in the .23 source and it now works properly. Should the code be reverted back as I did, or is there something I should change in our userspace code that reads from the serial port to correct it instead? Thanks, Rick -- Richard Warner Lead Systems Integrator Microway, Inc (508)732-5517 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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