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Message-Id: <1404379241-8590-154-git-send-email-luis.henriques@canonical.com>
Date: Thu, 3 Jul 2014 10:19:56 +0100
From: Luis Henriques <luis.henriques@...onical.com>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
Amir Vadai <amirv@...lanox.com>,
Jack Morgenstein <jackm@....mellanox.co.il>,
Or Gerlitz <ogerlitz@...lanox.com>,
Wei Yang <weiyang@...ux.vnet.ibm.com>,
"David S. Miller" <davem@...emloft.net>,
Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 153/198] net/mlx4_core: Preserve pci_dev_data after __mlx4_remove_one()
3.11.10.13 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Wei Yang <weiyang@...ux.vnet.ibm.com>
commit befdf8978accecac2e0739e6b5075afc62db37fe upstream.
pci_match_id() just match the static pci_device_id, which may return NULL if
someone binds the driver to a device manually using
/sys/bus/pci/drivers/.../new_id.
This patch wrap up a helper function __mlx4_remove_one() which does the tear
down function but preserve the drv_data. Functions like
mlx4_pci_err_detected() and mlx4_restart_one() will call this one with out
releasing drvdata.
Fixes: 97a5221 "net/mlx4_core: pass pci_device_id.driver_data to __mlx4_init_one during reset".
CC: Bjorn Helgaas <bhelgaas@...gle.com>
CC: Amir Vadai <amirv@...lanox.com>
CC: Jack Morgenstein <jackm@....mellanox.co.il>
CC: Or Gerlitz <ogerlitz@...lanox.com>
Signed-off-by: Wei Yang <weiyang@...ux.vnet.ibm.com>
Acked-by: Jack Morgenstein <jackm@....mellanox.co.il>
Signed-off-by: David S. Miller <davem@...emloft.net>
[ luis: backported to 3.11: used davem's backport for 3.10 ]
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
drivers/net/ethernet/mellanox/mlx4/main.c | 172 +++++++++++++++++-------------
drivers/net/ethernet/mellanox/mlx4/mlx4.h | 1 +
2 files changed, 97 insertions(+), 76 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index c495c604ead3..429f079507e7 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -2134,13 +2134,8 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data)
/* Allow large DMA segments, up to the firmware limit of 1 GB */
dma_set_max_seg_size(&pdev->dev, 1024 * 1024 * 1024);
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- err = -ENOMEM;
- goto err_release_regions;
- }
-
- dev = &priv->dev;
+ dev = pci_get_drvdata(pdev);
+ priv = mlx4_priv(dev);
dev->pdev = pdev;
INIT_LIST_HEAD(&priv->ctx_list);
spin_lock_init(&priv->ctx_lock);
@@ -2305,8 +2300,7 @@ slave_start:
mlx4_sense_init(dev);
mlx4_start_sense(dev);
- priv->pci_dev_data = pci_dev_data;
- pci_set_drvdata(pdev, dev);
+ priv->removed = 0;
return 0;
@@ -2372,84 +2366,110 @@ err_disable_pdev:
static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
+ struct mlx4_priv *priv;
+ struct mlx4_dev *dev;
+
printk_once(KERN_INFO "%s", mlx4_version);
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev = &priv->dev;
+ pci_set_drvdata(pdev, dev);
+ priv->pci_dev_data = id->driver_data;
+
return __mlx4_init_one(pdev, id->driver_data);
}
-static void mlx4_remove_one(struct pci_dev *pdev)
+static void __mlx4_remove_one(struct pci_dev *pdev)
{
struct mlx4_dev *dev = pci_get_drvdata(pdev);
struct mlx4_priv *priv = mlx4_priv(dev);
+ int pci_dev_data;
int p;
- if (dev) {
- /* in SRIOV it is not allowed to unload the pf's
- * driver while there are alive vf's */
- if (mlx4_is_master(dev)) {
- if (mlx4_how_many_lives_vf(dev))
- printk(KERN_ERR "Removing PF when there are assigned VF's !!!\n");
- }
- mlx4_stop_sense(dev);
- mlx4_unregister_device(dev);
+ if (priv->removed)
+ return;
- for (p = 1; p <= dev->caps.num_ports; p++) {
- mlx4_cleanup_port_info(&priv->port[p]);
- mlx4_CLOSE_PORT(dev, p);
- }
+ pci_dev_data = priv->pci_dev_data;
- if (mlx4_is_master(dev))
- mlx4_free_resource_tracker(dev,
- RES_TR_FREE_SLAVES_ONLY);
-
- mlx4_cleanup_counters_table(dev);
- mlx4_cleanup_mcg_table(dev);
- mlx4_cleanup_qp_table(dev);
- mlx4_cleanup_srq_table(dev);
- mlx4_cleanup_cq_table(dev);
- mlx4_cmd_use_polling(dev);
- mlx4_cleanup_eq_table(dev);
- mlx4_cleanup_mr_table(dev);
- mlx4_cleanup_xrcd_table(dev);
- mlx4_cleanup_pd_table(dev);
+ /* in SRIOV it is not allowed to unload the pf's
+ * driver while there are alive vf's */
+ if (mlx4_is_master(dev)) {
+ if (mlx4_how_many_lives_vf(dev))
+ printk(KERN_ERR "Removing PF when there are assigned VF's !!!\n");
+ }
+ mlx4_stop_sense(dev);
+ mlx4_unregister_device(dev);
- if (mlx4_is_master(dev))
- mlx4_free_resource_tracker(dev,
- RES_TR_FREE_STRUCTS_ONLY);
-
- iounmap(priv->kar);
- mlx4_uar_free(dev, &priv->driver_uar);
- mlx4_cleanup_uar_table(dev);
- if (!mlx4_is_slave(dev))
- mlx4_clear_steering(dev);
- mlx4_free_eq_table(dev);
- if (mlx4_is_master(dev))
- mlx4_multi_func_cleanup(dev);
- mlx4_close_hca(dev);
- if (mlx4_is_slave(dev))
- mlx4_multi_func_cleanup(dev);
- mlx4_cmd_cleanup(dev);
-
- if (dev->flags & MLX4_FLAG_MSI_X)
- pci_disable_msix(pdev);
- if (dev->flags & MLX4_FLAG_SRIOV) {
- mlx4_warn(dev, "Disabling SR-IOV\n");
- pci_disable_sriov(pdev);
- }
+ for (p = 1; p <= dev->caps.num_ports; p++) {
+ mlx4_cleanup_port_info(&priv->port[p]);
+ mlx4_CLOSE_PORT(dev, p);
+ }
+
+ if (mlx4_is_master(dev))
+ mlx4_free_resource_tracker(dev,
+ RES_TR_FREE_SLAVES_ONLY);
+
+ mlx4_cleanup_counters_table(dev);
+ mlx4_cleanup_qp_table(dev);
+ mlx4_cleanup_srq_table(dev);
+ mlx4_cleanup_cq_table(dev);
+ mlx4_cmd_use_polling(dev);
+ mlx4_cleanup_eq_table(dev);
+ mlx4_cleanup_mcg_table(dev);
+ mlx4_cleanup_mr_table(dev);
+ mlx4_cleanup_xrcd_table(dev);
+ mlx4_cleanup_pd_table(dev);
- if (!mlx4_is_slave(dev))
- mlx4_free_ownership(dev);
+ if (mlx4_is_master(dev))
+ mlx4_free_resource_tracker(dev,
+ RES_TR_FREE_STRUCTS_ONLY);
- kfree(dev->caps.qp0_tunnel);
- kfree(dev->caps.qp0_proxy);
- kfree(dev->caps.qp1_tunnel);
- kfree(dev->caps.qp1_proxy);
+ iounmap(priv->kar);
+ mlx4_uar_free(dev, &priv->driver_uar);
+ mlx4_cleanup_uar_table(dev);
+ if (!mlx4_is_slave(dev))
+ mlx4_clear_steering(dev);
+ mlx4_free_eq_table(dev);
+ if (mlx4_is_master(dev))
+ mlx4_multi_func_cleanup(dev);
+ mlx4_close_hca(dev);
+ if (mlx4_is_slave(dev))
+ mlx4_multi_func_cleanup(dev);
+ mlx4_cmd_cleanup(dev);
- kfree(priv);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- pci_set_drvdata(pdev, NULL);
+ if (dev->flags & MLX4_FLAG_MSI_X)
+ pci_disable_msix(pdev);
+ if (dev->flags & MLX4_FLAG_SRIOV) {
+ mlx4_warn(dev, "Disabling SR-IOV\n");
+ pci_disable_sriov(pdev);
}
+
+ if (!mlx4_is_slave(dev))
+ mlx4_free_ownership(dev);
+
+ kfree(dev->caps.qp0_tunnel);
+ kfree(dev->caps.qp0_proxy);
+ kfree(dev->caps.qp1_tunnel);
+ kfree(dev->caps.qp1_proxy);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ memset(priv, 0, sizeof(*priv));
+ priv->pci_dev_data = pci_dev_data;
+ priv->removed = 1;
+}
+
+static void mlx4_remove_one(struct pci_dev *pdev)
+{
+ struct mlx4_dev *dev = pci_get_drvdata(pdev);
+ struct mlx4_priv *priv = mlx4_priv(dev);
+
+ __mlx4_remove_one(pdev);
+ kfree(priv);
+ pci_set_drvdata(pdev, NULL);
}
int mlx4_restart_one(struct pci_dev *pdev)
@@ -2459,7 +2479,7 @@ int mlx4_restart_one(struct pci_dev *pdev)
int pci_dev_data;
pci_dev_data = priv->pci_dev_data;
- mlx4_remove_one(pdev);
+ __mlx4_remove_one(pdev);
return __mlx4_init_one(pdev, pci_dev_data);
}
@@ -2514,7 +2534,7 @@ MODULE_DEVICE_TABLE(pci, mlx4_pci_table);
static pci_ers_result_t mlx4_pci_err_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
- mlx4_remove_one(pdev);
+ __mlx4_remove_one(pdev);
return state == pci_channel_io_perm_failure ?
PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
@@ -2522,11 +2542,11 @@ static pci_ers_result_t mlx4_pci_err_detected(struct pci_dev *pdev,
static pci_ers_result_t mlx4_pci_slot_reset(struct pci_dev *pdev)
{
- const struct pci_device_id *id;
- int ret;
+ struct mlx4_dev *dev = pci_get_drvdata(pdev);
+ struct mlx4_priv *priv = mlx4_priv(dev);
+ int ret;
- id = pci_match_id(mlx4_pci_table, pdev);
- ret = __mlx4_init_one(pdev, id->driver_data);
+ ret = __mlx4_init_one(pdev, priv->pci_dev_data);
return ret ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 17d9277e33ef..19e7fc004588 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -763,6 +763,7 @@ struct mlx4_priv {
spinlock_t ctx_lock;
int pci_dev_data;
+ int removed;
struct list_head pgdir_list;
struct mutex pgdir_mutex;
--
1.9.1
--
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