提交 585d98e0 编写于 作者: T Thomas Petazzoni 提交者: Greg Kroah-Hartman

char: misc: assign file->private_data in all cases

In fa1f68db ("drivers: misc: pass miscdevice pointer via file
private data"), the misc driver infrastructure was changed to assigned
file->private_data as a pointer to the 'struct miscdevice' that
corresponds to the device being opened.

However, this assignment was only done when the misc driver was
declaring a driver-specific ->open() operation in its
file_operations. This doesn't make sense, as the driver may not
necessarily have a custom ->open() operation, and might still be
interested in having file->private_data properly set for use in its
->read() and write() operations.

Therefore, we move the assignment of file->private_data outside of the
condition that tests whether a driver-specific ->open() operation was
defined.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 2608fb65
......@@ -143,8 +143,8 @@ static int misc_open(struct inode * inode, struct file * file)
err = 0;
old_fops = file->f_op;
file->f_op = new_fops;
file->private_data = c;
if (file->f_op->open) {
file->private_data = c;
err=file->f_op->open(inode,file);
if (err) {
fops_put(file->f_op);
......
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