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mei: use connect_data on the stack

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There is no need for dynamic allocation for connect_data.
We can use variable on the stack and make code less
error prone and simple

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2014-08-21 14:29:23 +03:00 committed by Greg Kroah-Hartman
parent 4f046e7b6f
commit 154eb18fed
1 changed files with 5 additions and 16 deletions
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21
drivers/misc/mei/main.c
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@ -433,9 +433,6 @@ static int mei_ioctl_connect_client(struct file *file,
int rets;
cl = file->private_data;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
if (dev->dev_state != MEI_DEV_ENABLED) {
@ -506,7 +503,6 @@ end:
return rets;
}
/**
* mei_ioctl - the IOCTL function
*
@ -520,7 +516,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
{
struct mei_device *dev;
struct mei_cl *cl = file->private_data;
struct mei_connect_client_data *connect_data = NULL;
struct mei_connect_client_data connect_data;
int rets;
@ -540,26 +536,19 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
switch (cmd) {
case IOCTL_MEI_CONNECT_CLIENT:
dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n");
connect_data = kzalloc(sizeof(struct mei_connect_client_data),
GFP_KERNEL);
if (!connect_data) {
rets = -ENOMEM;
goto out;
}
if (copy_from_user(connect_data, (char __user *)data,
if (copy_from_user(&connect_data, (char __user *)data,
sizeof(struct mei_connect_client_data))) {
dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}
rets = mei_ioctl_connect_client(file, connect_data);
rets = mei_ioctl_connect_client(file, &connect_data);
if (rets)
goto out;
/* if all is ok, copying the data back to user. */
if (copy_to_user((char __user *)data, connect_data,
if (copy_to_user((char __user *)data, &connect_data,
sizeof(struct mei_connect_client_data))) {
dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
@ -567,13 +556,13 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
}
break;
default:
dev_err(&dev->pdev->dev, ": unsupported ioctl %d.\n", cmd);
rets = -ENOIOCTLCMD;
}
out:
kfree(connect_data);
mutex_unlock(&dev->device_lock);
return rets;
}