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RDMA/core: Use simpler spin lock irq API from blocking context 

add_client_context(), ib_unregister_device() and ib_unregister_client()
are designed to call from blocking context.  There is no need to save and
restore last interrupt state when called from such blocking context.  Even
though this is not a performance path, using the right spin lock API is
desired for code clarity.

To avoid checkpatch warning while removing flags, sizeof() is used.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2018-08-28 15:08:44 +03:00 committed by Jason Gunthorpe
parent 4512acd0d3
commit 2d65f49ff9
1 changed files with 9 additions and 11 deletions
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20
drivers/infiniband/core/device.c
View File

@ -297,9 +297,8 @@ EXPORT_SYMBOL(ib_dealloc_device);
static int add_client_context(struct ib_device *device, struct ib_client *client)
{
struct ib_client_data *context;
unsigned long flags;
context = kmalloc(sizeof *context, GFP_KERNEL);
context = kmalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return -ENOMEM;
@ -308,9 +307,9 @@ static int add_client_context(struct ib_device *device, struct ib_client *client
context->going_down = false;
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
spin_lock_irq(&device->client_data_lock);
list_add(&context->list, &device->client_data_list);
spin_unlock_irqrestore(&device->client_data_lock, flags);
spin_unlock_irq(&device->client_data_lock);
up_write(&lists_rwsem);
return 0;
@ -587,10 +586,10 @@ void ib_unregister_device(struct ib_device *device)
down_write(&lists_rwsem);
list_del(&device->core_list);
spin_lock_irqsave(&device->client_data_lock, flags);
spin_lock_irq(&device->client_data_lock);
list_for_each_entry(context, &device->client_data_list, list)
context->going_down = true;
spin_unlock_irqrestore(&device->client_data_lock, flags);
spin_unlock_irq(&device->client_data_lock);
downgrade_write(&lists_rwsem);
list_for_each_entry(context, &device->client_data_list, list) {
@ -668,7 +667,6 @@ void ib_unregister_client(struct ib_client *client)
{
struct ib_client_data *context;
struct ib_device *device;
unsigned long flags;
mutex_lock(&device_mutex);
@ -680,14 +678,14 @@ void ib_unregister_client(struct ib_client *client)
struct ib_client_data *found_context = NULL;
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
spin_lock_irq(&device->client_data_lock);
list_for_each_entry(context, &device->client_data_list, list)
if (context->client == client) {
context->going_down = true;
found_context = context;
break;
}
spin_unlock_irqrestore(&device->client_data_lock, flags);
spin_unlock_irq(&device->client_data_lock);
up_write(&lists_rwsem);
if (client->remove)
@ -701,9 +699,9 @@ void ib_unregister_client(struct ib_client *client)
}
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
spin_lock_irq(&device->client_data_lock);
list_del(&found_context->list);
spin_unlock_irqrestore(&device->client_data_lock, flags);
spin_unlock_irq(&device->client_data_lock);
up_write(&lists_rwsem);
kfree(found_context);
}