https://bugzilla.kernel.org/show_bug.cgi?id=16058 --- Comment #1 from Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> 2010-05-27 20:31:16 --- On Thu, 27 May 2010, Andrew Morton wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=16058 > > Summary: [BUG] Cannot boot any kernel from 2.6.27 on if a 256 > byte sector SCSI disk is attached > As of 2.6.27 if any SCSI disk is attached that has been formatted with a 256 > byte sector size, the boot process hangs. 512, 768, and 1024 byte sector disks > do not seem to trigger this. The disks in use do NOT have a partition table. > They are being used by out applications via the sg_io interface only. > > A 2.6.26.8 kernel works fine. > > I have bisected this problem to the following commit: > > # git bisect good > 427e59f09fdba387547106de7bab980b7fff77be is first bad commit > commit 427e59f09fdba387547106de7bab980b7fff77be > Author: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> > Date: Sat Mar 8 18:24:17 2008 -0600 > > [SCSI] make use of the residue value > > USB sometimes doesn't return an error but instead returns a residue > value indicating part (or all) of the command wasn't completed. So if > the driver _done() error processing indicates the command was fully > processed, subtract off the residue so that this USB error gets > propagated. > > Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> > > :040000 040000 d3bad84ebe1bc231e8e7d6267907ca62fd4d0dcd > c85f8cb8bd4910724f0101e41054555980727e16 M drivers > > Now, what USB has to do with my SCSI disks is beyond me. I have a > feeling that this commit is just uncovering another problem. I've attached > a bootlog from a serial console that ends where the boot hangs. > > The does the same thing on a 2.6.34 kernel. Anything I can do to help, I'm > available. I'd guess that this has nothing to do with the sector size. Instead the drive probably reports a non-zero residue when it shouldn't. Can you add some debugging printk's to the patch to find out in more detail what's going wrong? Alan Stern -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
