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IB/ucm: convert semaphore to mutex 

Convert semaphore in ib_ucm_file to a real mutex.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
wifi-calibration
Sean Hefty 2006-05-25 10:03:23 -07:00 committed by Roland Dreier
parent 6bfa24fa3e
commit 4be10c1e6d
1 changed files with 16 additions and 16 deletions
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32
drivers/infiniband/core/ucm.c
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@ -64,7 +64,7 @@ struct ib_ucm_device {
};
struct ib_ucm_file {
struct semaphore mutex;
struct mutex file_mutex;
struct file *filp;
struct ib_ucm_device *device;
@ -153,7 +153,7 @@ static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
{
struct ib_ucm_event *uevent;
down(&ctx->file->mutex);
mutex_lock(&ctx->file->file_mutex);
list_del(&ctx->file_list);
while (!list_empty(&ctx->events)) {
@ -168,7 +168,7 @@ static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
kfree(uevent);
}
up(&ctx->file->mutex);
mutex_unlock(&ctx->file->file_mutex);
}
static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
@ -375,11 +375,11 @@ static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
if (result)
goto err2;
down(&ctx->file->mutex);
mutex_lock(&ctx->file->file_mutex);
list_add_tail(&uevent->file_list, &ctx->file->events);
list_add_tail(&uevent->ctx_list, &ctx->events);
wake_up_interruptible(&ctx->file->poll_wait);
up(&ctx->file->mutex);
mutex_unlock(&ctx->file->file_mutex);
return 0;
err2:
@ -405,7 +405,7 @@ static ssize_t ib_ucm_event(struct ib_ucm_file *file,
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT;
down(&file->mutex);
mutex_lock(&file->file_mutex);
while (list_empty(&file->events)) {
if (file->filp->f_flags & O_NONBLOCK) {
@ -420,9 +420,9 @@ static ssize_t ib_ucm_event(struct ib_ucm_file *file,
prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE);
up(&file->mutex);
mutex_unlock(&file->file_mutex);
schedule();
down(&file->mutex);
mutex_lock(&file->file_mutex);
finish_wait(&file->poll_wait, &wait);
}
@ -482,7 +482,7 @@ static ssize_t ib_ucm_event(struct ib_ucm_file *file,
kfree(uevent->info);
kfree(uevent);
done:
up(&file->mutex);
mutex_unlock(&file->file_mutex);
return result;
}
@ -501,9 +501,9 @@ static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT;
down(&file->mutex);
mutex_lock(&file->file_mutex);
ctx = ib_ucm_ctx_alloc(file);
up(&file->mutex);
mutex_unlock(&file->file_mutex);
if (!ctx)
return -ENOMEM;
@ -1177,7 +1177,7 @@ static int ib_ucm_open(struct inode *inode, struct file *filp)
INIT_LIST_HEAD(&file->ctxs);
init_waitqueue_head(&file->poll_wait);
init_MUTEX(&file->mutex);
mutex_init(&file->file_mutex);
filp->private_data = file;
file->filp = filp;
@ -1191,11 +1191,11 @@ static int ib_ucm_close(struct inode *inode, struct file *filp)
struct ib_ucm_file *file = filp->private_data;
struct ib_ucm_context *ctx;
down(&file->mutex);
mutex_lock(&file->file_mutex);
while (!list_empty(&file->ctxs)) {
ctx = list_entry(file->ctxs.next,
struct ib_ucm_context, file_list);
up(&file->mutex);
mutex_unlock(&file->file_mutex);
mutex_lock(&ctx_id_mutex);
idr_remove(&ctx_id_table, ctx->id);
@ -1205,9 +1205,9 @@ static int ib_ucm_close(struct inode *inode, struct file *filp)
ib_ucm_cleanup_events(ctx);
kfree(ctx);
down(&file->mutex);
mutex_lock(&file->file_mutex);
}
up(&file->mutex);
mutex_unlock(&file->file_mutex);
kfree(file);
return 0;
}