This is a note to let you know that I've just added the patch titled
SCSI: isci: fix reset timeout handling
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-isci-fix-reset-timeout-handling.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ddfadd7736b677de2d4ca2cd5b4b655368c85a7a Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Thu, 6 Feb 2014 12:23:01 -0800
Subject: SCSI: isci: fix reset timeout handling
From: Dan Williams <dan.j.williams@xxxxxxxxx>
commit ddfadd7736b677de2d4ca2cd5b4b655368c85a7a upstream.
Remove an erroneous BUG_ON() in the case of a hard reset timeout. The
reset timeout handler puts the port into the "awaiting link-up" state.
The timeout causes the device to be disconnected and we need to be in
the awaiting link-up state to re-connect the port. The BUG_ON() made
the incorrect assumption that resets never timeout and we always
complete the reset in the "resetting" state.
Testing this patch also uncovered that libata continues to attempt to
reset the port long after the driver has torn down the context. Once
the driver has committed to abandoning the link it must indicate to
libata that recovery ends by returning -ENODEV from
->lldd_I_T_nexus_reset().
Acked-by: Lukasz Dorau <lukasz.dorau@xxxxxxxxx>
Reported-by: David Milburn <dmilburn@xxxxxxxxxx>
Reported-by: Xun Ni <xun.ni@xxxxxxxxx>
Tested-by: Xun Ni <xun.ni@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/isci/port_config.c | 7 -------
drivers/scsi/isci/task.c | 2 +-
2 files changed, 1 insertion(+), 8 deletions(-)
--- a/drivers/scsi/isci/port_config.c
+++ b/drivers/scsi/isci/port_config.c
@@ -619,13 +619,6 @@ static void sci_apc_agent_link_up(struct
SCIC_SDS_APC_WAIT_LINK_UP_NOTIFICATION);
} else {
/* the phy is already the part of the port */
- u32 port_state = iport->sm.current_state_id;
-
- /* if the PORT'S state is resetting then the link up is from
- * port hard reset in this case, we need to tell the port
- * that link up is recieved
- */
- BUG_ON(port_state != SCI_PORT_RESETTING);
port_agent->phy_ready_mask |= 1 << phy_index;
sci_port_link_up(iport, iphy);
}
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -1312,7 +1312,7 @@ int isci_task_I_T_nexus_reset(struct dom
/* XXX: need to cleanup any ireqs targeting this
* domain_device
*/
- ret = TMF_RESP_FUNC_COMPLETE;
+ ret = -ENODEV;
goto out;
}
Patches currently in stable-queue which might be from dan.j.williams@xxxxxxxxx are
queue-3.4/scsi-isci-correct-erroneous-for_each_isci_host-macro.patch
queue-3.4/scsi-isci-fix-reset-timeout-handling.patch
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