pds_core: fix debugfs_lookup dentry leak and error handling

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debugfs_lookup() returns a dentry with an elevated reference count that
must be released with dput(). The current code discards the returned
dentry without calling dput(), causing a reference leak on every
firmware reset recovery.

Additionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup()
returns ERR_PTR(-ENODEV), not NULL. The current check passes for error
pointers and would call dput() on an invalid pointer, causing a crash.

Fixes: bc90fbe0c3 ("pds_core: Rework teardown/setup flow to be more common")
Signed-off-by: Nikhil P. Rao <nikhil.rao@amd.com>
Link: https://patch.msgid.link/20260515212907.998028-3-nikhil.rao@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Nikhil P. Rao 2026-05-15 21:29:07 +00:00 • committed by Jakub Kicinski

parent 0e46b6635b

commit dc416e32ba

1 changed files with 6 additions and 1 deletions

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7

drivers/net/ethernet/amd/pds_core/debugfs.c

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