diff options
| author |   Tomas Winkler <tomas.winkler@intel.com> | 2013-09-16 23:44:46 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-03 16:00:52 -0700 |
| commit | e036cc5727eb6d471442d2a9218990aa11215400 (patch) | |
| tree | 0eb7788e41d4631828374da6320fadd85fa1b93a /drivers/misc | |
| parent | Merge 3.12-rc3 into char-misc-next (diff) | |
| download | linux-dev-e036cc5727eb6d471442d2a9218990aa11215400.tar.xz linux-dev-e036cc5727eb6d471442d2a9218990aa11215400.zip | |
mei: simplify mei_open error handling
1. Perform simple checks first and only then attempt to allocate cl structure.
2. Remove open_handler_count test, this is already checked in mei_cl_link function
3. return -EMFILE instead of -ENOENT as expected by user space
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/client.c | 8 | ||||
| -rw-r--r-- | drivers/misc/mei/main.c | 31 |
2 files changed, 21 insertions, 18 deletions
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index fbd319c506e6..88770e040dd1 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -288,7 +288,13 @@ int mei_cl_link(struct mei_cl *cl, int id) if (id >= MEI_CLIENTS_MAX) { dev_err(&dev->pdev->dev, "id exceded %d", MEI_CLIENTS_MAX) ; - return -ENOENT; + return -EMFILE; + } + + if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) { + dev_err(&dev->pdev->dev, "open_handle_count exceded %d", + MEI_MAX_OPEN_HANDLE_COUNT); + return -EMFILE; } if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) { diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index c71420ef1e37..87ab5ca1d633 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -60,48 +60,45 @@ static int mei_open(struct inode *inode, struct file *file) int err; - err = -ENODEV; if (!misc->parent) - goto out; + return -ENODEV; pdev = container_of(misc->parent, struct pci_dev, dev); dev = pci_get_drvdata(pdev); if (!dev) - goto out; + return -ENODEV; mutex_lock(&dev->device_lock); - err = -ENOMEM; - cl = mei_cl_allocate(dev); - if (!cl) - goto out_unlock; + + cl = NULL; err = -ENODEV; if (dev->dev_state != MEI_DEV_ENABLED) { dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n", mei_dev_state_str(dev->dev_state)); - goto out_unlock; - } - err = -EMFILE; - if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) { - dev_err(&dev->pdev->dev, "open_handle_count exceded %d", - MEI_MAX_OPEN_HANDLE_COUNT); - goto out_unlock; + goto err_unlock; } + err = -ENOMEM; + cl = mei_cl_allocate(dev); + if (!cl) + goto err_unlock; + + /* open_handle_count check is handled in the mei_cl_link */ err = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY); if (err) - goto out_unlock; + goto err_unlock; file->private_data = cl; + mutex_unlock(&dev->device_lock); return nonseekable_open(inode, file); -out_unlock: +err_unlock: mutex_unlock(&dev->device_lock); kfree(cl); -out: return err; } |