Re: libata bugfix: preserve LBA bit for HDIO_DRIVE_TASK

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Mark Lord wrote:
Tejun Heo wrote:
Mark Lord wrote:
Ideally, this would go into linux-2.6.21.

Preserve the LBA bit in the DevSel/Head register for HDIO_DRIVE_TASK.

Signed-off-by:  Mark Lord <mlord@xxxxxxxxx>
---
--- linux/drivers/ata/libata-scsi.c.orig    2007-03-21
13:35:02.000000000 -0400
+++ linux/drivers/ata/libata-scsi.c 2007-03-30 17:40:58.000000000 -0400
@@ -333,7 +333,7 @@
    scsi_cmd[8]  = args[3];
    scsi_cmd[10] = args[4];
    scsi_cmd[12] = args[5];
-    scsi_cmd[13] = args[6] & 0x0f;
+    scsi_cmd[13] = args[6] & 0x4f;
    scsi_cmd[14] = args[0];

    /* Good values for timeout and retries?  Values below

IDE seems to be just overriding devsel (0x10) and leaving the rest
alone. Maybe we should do (args[6] & ~0x10) here? Or is it safer this way?

Same thoughts here.  I went "conservative" on this one,
because the entire field has been all zeros until this patch,
and I didn't want to trigger any possible latent bugs in libata.

Whatever.

Yeah, I agree 'whatever' should work here.  :-)

Acked-by: Tejun Heo <htejun@xxxxxxxxx>

--
tejun
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