This is a note to let you know that I've just added the patch titled
powerpc/eeh: Don't report error in eeh_pe_reset_and_recover()
to the 4.4-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:
powerpc-eeh-don-t-report-error-in-eeh_pe_reset_and_recover.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From affeb0f2d3a9af419ad7ef4ac782e1540b2f7b28 Mon Sep 17 00:00:00 2001
From: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
Date: Wed, 27 Apr 2016 11:14:50 +1000
Subject: powerpc/eeh: Don't report error in eeh_pe_reset_and_recover()
From: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
commit affeb0f2d3a9af419ad7ef4ac782e1540b2f7b28 upstream.
The function eeh_pe_reset_and_recover() is used to recover EEH
error when the passthrough device are transferred to guest and
backwards, meaning the device's driver is vfio-pci or none.
When the driver is vfio-pci that provides error_detected() error
handler only, the handler simply stops the guest and it's not
expected behaviour. On the other hand, no error handlers will
be called if we don't have a bound driver.
This ignores the error handler in eeh_pe_reset_and_recover()
that reports the error to device driver to avoid the exceptional
behaviour.
Fixes: 5cfb20b9 ("powerpc/eeh: Emulate EEH recovery for VFIO devices")
Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Russell Currey <ruscur@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/eeh_driver.c | 3 ---
1 file changed, 3 deletions(-)
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -504,9 +504,6 @@ int eeh_pe_reset_and_recover(struct eeh_
/* Save states */
eeh_pe_dev_traverse(pe, eeh_dev_save_state, NULL);
- /* Report error */
- eeh_pe_dev_traverse(pe, eeh_report_error, &result);
-
/* Issue reset */
ret = eeh_reset_pe(pe);
if (ret) {
Patches currently in stable-queue which might be from gwshan@xxxxxxxxxxxxxxxxxx are
queue-4.4/powerpc-eeh-restore-initial-state-in-eeh_pe_reset_and_recover.patch
queue-4.4/revert-powerpc-eeh-fix-crash-in-eeh_add_device_early-on-cell.patch
queue-4.4/powerpc-eeh-don-t-report-error-in-eeh_pe_reset_and_recover.patch
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