[PATCH] ibmvscsi: don't send host info in adapter info MAD after LPM

[PATCH] ibmvscsi: don't send host info in adapter info MAD after LPM

[Tyrel Datwyler]

The adatper info MAD is used to send the client info and receive the
host info as a response. A peristent buffer is used and as such the
client info is overwritten after the response. During the course of
a normal adapter reset the client info is refreshed in the buffer in
preparation for sending the adapter info MAD.

However, in the special case of LPM where we reenable the CRQ instead
of a full CRQ teardown and reset we fail to refresh the client info in
the adapter info buffer. As a result after Live Partition Migration
(LPM) we erroneously report the hosts info as our own.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvscsi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 59f0f1030c54..c5711c659b51 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -415,6 +415,8 @@ static int ibmvscsi_reenable_crq_queue(struct crq_queue *queue,
 	int rc = 0;
 	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
 
+	set_adapter_info(hostdata);
+
 	/* Re-enable the CRQ */
 	do {
 		if (rc)
-- 
2.26.1

Re: [PATCH] ibmvscsi: don't send host info in adapter info MAD after LPM

[Martin K. Petersen]

On Wed, 3 Jun 2020 15:36:32 -0500, Tyrel Datwyler wrote:

> The adatper info MAD is used to send the client info and receive the
> host info as a response. A peristent buffer is used and as such the
> client info is overwritten after the response. During the course of
> a normal adapter reset the client info is refreshed in the buffer in
> preparation for sending the adapter info MAD.
> 
> However, in the special case of LPM where we reenable the CRQ instead
> of a full CRQ teardown and reset we fail to refresh the client info in
> the adapter info buffer. As a result after Live Partition Migration
> (LPM) we erroneously report the hosts info as our own.

Applied to 5.8/scsi-queue, thanks!

[1/1] scsi: ibmvscsi: Don't send host info in adapter info MAD after LPM
      https://git.kernel.org/mkp/scsi/c/4919b33b63c8

-- 
Martin K. Petersen	Oracle Linux Engineering