On 11/30/2017 04:40 AM, Himanshu Madhani wrote:
> When driver is loaded in Target/Dual mode, it creates QPair
> to support MQ and allocates resources for each QPair. This Qpair
> initialization is delayed until the FW personality is changed to
> Dual/Target mode by issuing chip reset. At the time of chip reset
> firmware is re-initilized in correct personality all the QPairs
> are initialized by sending MBC_INITIALIZE_MULTIQ (001Fh).
>
> This patch fixes memory leak by adding check to issue
> MBC_INITIALIZE_MULTIQ command only while deleting rsp/req queue
> when the flag is set for initiator mode, and clean up QPair resources
> correctly during the driver unload. This MBX does not need to be
> issued for Target/Dual mode because chip reset will reset ISP.
>
> Fixes: d65237c7f0860 ("scsi: qla2xxx: Fix mailbox failure while deleting Queue pairs")
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.10+
> Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
> ---
> drivers/scsi/qla2xxx/qla_init.c | 4 +---
> drivers/scsi/qla2xxx/qla_mid.c | 18 ++++++++++--------
> 2 files changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
> index 57b8f43c5980..58663df38627 100644
> --- a/drivers/scsi/qla2xxx/qla_init.c
> +++ b/drivers/scsi/qla2xxx/qla_init.c
> @@ -8220,9 +8220,6 @@ int qla2xxx_delete_qpair(struct scsi_qla_host *vha, struct qla_qpair *qpair)
> int ret = QLA_FUNCTION_FAILED;
> struct qla_hw_data *ha = qpair->hw;
>
> - if (!vha->flags.qpairs_req_created && !vha->flags.qpairs_rsp_created)
> - goto fail;
> -
> qpair->delete_in_progress = 1;
> while (atomic_read(&qpair->ref_count))
> msleep(500);
> @@ -8230,6 +8227,7 @@ int qla2xxx_delete_qpair(struct scsi_qla_host *vha, struct qla_qpair *qpair)
> ret = qla25xx_delete_req_que(vha, qpair->req);
> if (ret != QLA_SUCCESS)
> goto fail;
> +
> ret = qla25xx_delete_rsp_que(vha, qpair->rsp);
> if (ret != QLA_SUCCESS)
> goto fail;
> diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
> index 618ca272d01a..e538e6308885 100644
> --- a/drivers/scsi/qla2xxx/qla_mid.c
> +++ b/drivers/scsi/qla2xxx/qla_mid.c
> @@ -575,14 +575,15 @@ qla25xx_free_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
> int
> qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
> {
> - int ret = -1;
> + int ret = QLA_SUCCESS;
>
> - if (req) {
> + if (req && vha->flags.qpairs_req_created) {
> req->options |= BIT_0;
> ret = qla25xx_init_req_que(vha, req);
> + if (ret != QLA_SUCCESS)
> + return QLA_FUNCTION_FAILED;
> }
> - if (ret == QLA_SUCCESS)
> - qla25xx_free_req_que(vha, req);
> + qla25xx_free_req_que(vha, req);
>
> return ret;
> }
> @@ -590,14 +591,15 @@ qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
> int
> qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
> {
> - int ret = -1;
> + int ret = QLA_SUCCESS;
>
> - if (rsp) {
> + if (rsp && vha->flags.qpairs_rsp_created) {
> rsp->options |= BIT_0;
> ret = qla25xx_init_rsp_que(vha, rsp);
> + if (ret != QLA_SUCCESS)
> + return QLA_FUNCTION_FAILED;
> }
> - if (ret == QLA_SUCCESS)
> - qla25xx_free_rsp_que(vha, rsp);
> + qla25xx_free_rsp_que(vha, rsp);
>
> return ret;
> }
>
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@xxxxxxx +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
