diff options
| author | Dongxiao Xu <dongxiao.xu@intel.com> | 2009-05-31 14:44:01 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-19 11:00:55 -0700 |
| commit | afcf462a1fd78cc372aefd9fe352e2dc2f237937 (patch) | |
| tree | ec346ebfcf6ad5e44be0cf9aedafc6cb2b86eb89 /drivers/staging/heci/io_heci.c | |
| parent | 8d1c50e9829442be5bc88979d587af2a5ff07e32 (diff) | |
Staging: heci: fix the problem that file_ext->state should be protected by device_lock
While access file_ext->state, we should use device_lock to protect it. The
original codes miss this in some places.
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/heci/io_heci.c')
| -rw-r--r-- | drivers/staging/heci/io_heci.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/staging/heci/io_heci.c b/drivers/staging/heci/io_heci.c index 0d7f31bed56..1a6faf88e16 100644 --- a/drivers/staging/heci/io_heci.c +++ b/drivers/staging/heci/io_heci.c @@ -297,6 +297,7 @@ int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num, if (!heci_connect(dev, file_ext)) { rets = -ENODEV; spin_unlock_bh(&dev->device_lock); + spin_unlock(&file_ext->file_lock); goto end; } else { file_ext->timer_count = HECI_CONNECT_TIMEOUT; @@ -320,7 +321,9 @@ int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num, || HECI_FILE_DISCONNECTED == file_ext->state), timeout * HZ); + spin_lock_bh(&dev->device_lock); if (HECI_FILE_CONNECTED == file_ext->state) { + spin_unlock_bh(&dev->device_lock); DBG("successfully connected to FW client.\n"); rets = file_ext->status; /* now copy the data to user space */ @@ -337,6 +340,7 @@ int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num, } else { DBG("failed to connect to FW client.file_ext->state = %d.\n", file_ext->state); + spin_unlock_bh(&dev->device_lock); if (!err) { DBG("wait_event_interruptible_timeout failed on client" " connect message fw response message.\n"); @@ -637,11 +641,13 @@ int heci_start_read(struct iamt_heci_device *dev, int if_num, DBG("received wrong function input param.\n"); return -ENODEV; } + + spin_lock_bh(&dev->device_lock); if (file_ext->state != HECI_FILE_CONNECTED) { + spin_unlock_bh(&dev->device_lock); return -ENODEV; } - spin_lock_bh(&dev->device_lock); if (dev->heci_state != HECI_ENABLED) { spin_unlock_bh(&dev->device_lock); return -ENODEV; |