Bug#338089: New aic7xxx driver fails spectacularly on 2940UW

[James Bottomley <James.Bottomley@SteelEye.com>]

On Sun, 2005-11-13 at 12:41 -0500, Doug Ledford wrote:
> If the drive is unaccessible after the DV failure, even on a warm reboot 
> (which includes a SCSI bus reset), then the drive is flat hung. 
> Something done in the current code is breaking it.  Can you get a boot 
> with DV turned off and capture the log messages and post them here 
> please?  You already said it didn't help with the problem, but I'd like 
> to see the failure scenario with it off, that might help determine the 
> true root cause of the issue.

Yes, you're right ... the sequencer code seems to identify the
WRITE_BUFFER as the failing command.  Can you try with the attached
patch, which will force DV to ignore the echo buffer write tests?

Thanks,

James

diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -816,8 +816,10 @@ spi_dv_device_internal(struct scsi_devic
 	 * do the SPI pattern write tests */
 
 	len = 0;
+#if 0
 	if (scsi_device_dt(sdev))
 		len = spi_dv_device_get_echo_buffer(sdev, buffer);
+#endif
 
  retry: