[PATCH 4.5 048/101] crypto: qat - fix invalid pf2vf_resp_wq logic

[Greg Kroah-Hartman]

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tadeusz Struk <tadeusz.st...@intel.com>

commit 9e209fcfb804da262e38e5cd2e680c47a41f0f95 upstream.

The pf2vf_resp_wq is a global so it has to be created at init
and destroyed at exit, instead of per device.

Tested-by: Suresh Marikkannu <sureshx.marikka...@intel.com>
Signed-off-by: Tadeusz Struk <tadeusz.st...@intel.com>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/crypto/qat/qat_common/adf_common_drv.h |    2 +
 drivers/crypto/qat/qat_common/adf_ctl_drv.c    |    6 +++++
 drivers/crypto/qat/qat_common/adf_sriov.c      |   26 +++++++++++++++----------
 3 files changed, 24 insertions(+), 10 deletions(-)

--- a/drivers/crypto/qat/qat_common/adf_common_drv.h
+++ b/drivers/crypto/qat/qat_common/adf_common_drv.h
@@ -144,6 +144,8 @@ void adf_disable_aer(struct adf_accel_de
 void adf_dev_restore(struct adf_accel_dev *accel_dev);
 int adf_init_aer(void);
 void adf_exit_aer(void);
+int adf_init_pf_wq(void);
+void adf_exit_pf_wq(void);
 int adf_init_admin_comms(struct adf_accel_dev *accel_dev);
 void adf_exit_admin_comms(struct adf_accel_dev *accel_dev);
 int adf_send_admin_init(struct adf_accel_dev *accel_dev);
--- a/drivers/crypto/qat/qat_common/adf_ctl_drv.c
+++ b/drivers/crypto/qat/qat_common/adf_ctl_drv.c
@@ -462,12 +462,17 @@ static int __init adf_register_ctl_devic
        if (adf_init_aer())
                goto err_aer;
 
+       if (adf_init_pf_wq())
+               goto err_pf_wq;
+
        if (qat_crypto_register())
                goto err_crypto_register;
 
        return 0;
 
 err_crypto_register:
+       adf_exit_pf_wq();
+err_pf_wq:
        adf_exit_aer();
 err_aer:
        adf_chr_drv_destroy();
@@ -480,6 +485,7 @@ static void __exit adf_unregister_ctl_de
 {
        adf_chr_drv_destroy();
        adf_exit_aer();
+       adf_exit_pf_wq();
        qat_crypto_unregister();
        adf_clean_vf_map(false);
        mutex_destroy(&adf_ctl_lock);
--- a/drivers/crypto/qat/qat_common/adf_sriov.c
+++ b/drivers/crypto/qat/qat_common/adf_sriov.c
@@ -119,11 +119,6 @@ static int adf_enable_sriov(struct adf_a
        int i;
        u32 reg;
 
-       /* Workqueue for PF2VF responses */
-       pf2vf_resp_wq = create_workqueue("qat_pf2vf_resp_wq");
-       if (!pf2vf_resp_wq)
-               return -ENOMEM;
-
        for (i = 0, vf_info = accel_dev->pf.vf_info; i < totalvfs;
             i++, vf_info++) {
                /* This ptr will be populated when VFs will be created */
@@ -216,11 +211,6 @@ void adf_disable_sriov(struct adf_accel_
 
        kfree(accel_dev->pf.vf_info);
        accel_dev->pf.vf_info = NULL;
-
-       if (pf2vf_resp_wq) {
-               destroy_workqueue(pf2vf_resp_wq);
-               pf2vf_resp_wq = NULL;
-       }
 }
 EXPORT_SYMBOL_GPL(adf_disable_sriov);
 
@@ -304,3 +294,19 @@ int adf_sriov_configure(struct pci_dev *
        return numvfs;
 }
 EXPORT_SYMBOL_GPL(adf_sriov_configure);
+
+int __init adf_init_pf_wq(void)
+{
+       /* Workqueue for PF2VF responses */
+       pf2vf_resp_wq = create_workqueue("qat_pf2vf_resp_wq");
+
+       return !pf2vf_resp_wq ? -ENOMEM : 0;
+}
+
+void adf_exit_pf_wq(void)
+{
+       if (pf2vf_resp_wq) {
+               destroy_workqueue(pf2vf_resp_wq);
+               pf2vf_resp_wq = NULL;
+       }
+}