iwlwifi: allocate Tx cmd pool per device

Different transports will have different needs: New tranports
need headroom for their own use before the Tx cmd. So allocate
the Tx cmd pool in the transport and give it a unique name
based on dev_name.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 0f59e1f2bcac..1eabb834e32a 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -1528,6 +1528,7 @@ void iwl_trans_pcie_free(struct iwl_trans *trans)
         iounmap(trans_pcie->hw_base);
         pci_release_regions(trans_pcie->pci_dev);
         pci_disable_device(trans_pcie->pci_dev);
+        kmem_cache_destroy(trans->dev_cmd_pool);
 
         kfree(trans);
 }
@@ -2042,6 +2043,7 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
 {
         struct iwl_trans_pcie *trans_pcie;
         struct iwl_trans *trans;
+        char cmd_pool_name[100];
         u16 pci_cmd;
         int err;
 
@@ -2138,8 +2140,25 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
         init_waitqueue_head(&trans->wait_command_queue);
         spin_lock_init(&trans->reg_lock);
 
+        snprintf(cmd_pool_name, sizeof(cmd_pool_name), "iwl_cmd_pool:%s",
+                 dev_name(trans->dev));
+
+        trans->dev_cmd_headroom = 0;
+        trans->dev_cmd_pool =
+                kmem_cache_create(cmd_pool_name,
+                                  sizeof(struct iwl_device_cmd)
+                                  + trans->dev_cmd_headroom,
+                                  sizeof(void *),
+                                  SLAB_HWCACHE_ALIGN,
+                                  NULL);
+
+        if (!trans->dev_cmd_pool)
+                goto out_pci_disable_msi;
+
         return trans;
 
+out_pci_disable_msi:
+        pci_disable_msi(pdev);
 out_pci_release_regions:
         pci_release_regions(pdev);
 out_pci_disable_device: