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Commit 9c4a45b1 authored by Christian Lamparter's avatar Christian Lamparter Committed by Greg Kroah-Hartman
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b43legacy: fix debugfs crash 



This patch fixes a crash that happens because b43legacy's
debugfs code expects file->f_op to be a pointer to its own
b43legacy_debugfs_fops struct. This is no longer the case
since commit 9fd4dcec
("debugfs: prevent access to possibly dead file_operations at file open")

Reviewed-by: default avatarNicolai Stange <nicstange@gmail.com>
Signed-off-by: default avatarChristian Lamparter <chunkeey@gmail.com>
Cc: stable <stable@vger.kernel.org> # 4.7+
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 51b275a6

drivers/net/wireless/broadcom/b43legacy/debugfs.c

+4 −2
Original line number Diff line number Diff line
@@ -221,7 +221,8 @@ static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf, 
		goto out_unlock;

	}



	dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops);

	dfops = container_of(debugfs_real_fops(file),

			     struct b43legacy_debugfs_fops, fops);

	if (!dfops->read) {

		err = -ENOSYS;

		goto out_unlock;
@@ -287,7 +288,8 @@ static ssize_t b43legacy_debugfs_write(struct file *file, 
		goto out_unlock;

	}



	dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops);

	dfops = container_of(debugfs_real_fops(file),

			     struct b43legacy_debugfs_fops, fops);

	if (!dfops->write) {

		err = -ENOSYS;

		goto out_unlock;