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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-24 10:13:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-24 10:13:55 -0800
commit7ac1161c2789be25d0d206e831b051f43028866e (patch)
treeb9e79ea15b34f9be500539beeeeb20d298628ac0 /fs/debugfs
parenta4dec04c7ff4307973ba502ce7b27330d9fe04b7 (diff)
parent3e4c982f1ce75faf5314477b8da296d2d00919df (diff)
Merge tag 'driver-core-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core / debugfs update from Greg KH: "Here is the "big" driver core and debugfs update for 5.12-rc1 This set of driver core patches caused a bunch of problems in linux-next for the past few weeks, when Saravana tried to set fw_devlink=on as the default functionality. This caused a number of systems to stop booting, and lots of bugs were fixed in this area for almost all of the reported systems, but this option is not ready to be turned on just yet for the default operation based on this testing, so I've reverted that change at the very end so we don't have to worry about regressions in 5.12 We will try to turn this on for 5.13 if testing goes better over the next few months. Other than the fixes caused by the fw_devlink testing in here, there's not much more: - debugfs fixes for invalid input into debugfs_lookup() - kerneldoc cleanups - warn message if platform drivers return an error on their remove callback (a futile effort, but good to catch). All of these have been in linux-next for a while now, and the regressions have gone away with the revert of the fw_devlink change" * tag 'driver-core-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (35 commits) Revert "driver core: Set fw_devlink=on by default" of: property: fw_devlink: Ignore interrupts property for some configs debugfs: do not attempt to create a new file before the filesystem is initalized debugfs: be more robust at handling improper input in debugfs_lookup() driver core: auxiliary bus: Fix calling stage for auxiliary bus init of: irq: Fix the return value for of_irq_parse_one() stub of: irq: make a stub for of_irq_parse_one() clk: Mark fwnodes when their clock provider is added/removed PM: domains: Mark fwnodes when their powerdomain is added/removed irqdomain: Mark fwnodes when their irqdomain is added/removed driver core: fw_devlink: Handle suppliers that don't use driver core of: property: Add fw_devlink support for optional properties driver core: Add fw_devlink.strict kernel param of: property: Don't add links to absent suppliers driver core: fw_devlink: Detect supplier devices that will never be added driver core: platform: Emit a warning if a remove callback returned non-zero of: property: Fix fw_devlink handling of interrupts/interrupts-extended gpiolib: Don't probe gpio_device if it's not the primary device device.h: Remove bogus "the" in kerneldoc gpiolib: Bind gpio_device to a driver to enable fw_devlink=on by default ...
Diffstat (limited to 'fs/debugfs')
-rw-r--r--fs/debugfs/inode.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index c35249497b9b..22e86ae4dd5a 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -298,7 +298,7 @@ struct dentry *debugfs_lookup(const char *name, struct dentry *parent)
{
struct dentry *dentry;
- if (IS_ERR(parent))
+ if (!debugfs_initialized() || IS_ERR_OR_NULL(name) || IS_ERR(parent))
return NULL;
if (!parent)
@@ -319,6 +319,9 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
if (!(debugfs_allow & DEBUGFS_ALLOW_API))
return ERR_PTR(-EPERM);
+ if (!debugfs_initialized())
+ return ERR_PTR(-ENOENT);
+
pr_debug("creating file '%s'\n", name);
if (IS_ERR(parent))