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| author | Johan Hovold <johan@kernel.org> | 2025-07-25 09:40:19 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-19 16:30:47 +0200 |
| commit | dbcbac8c47cbb9afe9853c18cad8f9e6336c2548 (patch) | |
| tree | 978589239c0660ce97eda76829309e9a19ca0c63 /drivers/firmware | |
| parent | 135eacbb111f37953687533adf067cd0351b5e8c (diff) | |
| download | linux-dbcbac8c47cbb9afe9853c18cad8f9e6336c2548.tar.gz linux-dbcbac8c47cbb9afe9853c18cad8f9e6336c2548.tar.bz2 linux-dbcbac8c47cbb9afe9853c18cad8f9e6336c2548.zip | |
firmware: meson_sm: fix device leak at probe
commit 8ece3173f87df03935906d0c612c2aeda9db92ca upstream.
Make sure to drop the reference to the secure monitor device taken by
of_find_device_by_node() when looking up its driver data on behalf of
other drivers (e.g. during probe).
Note that holding a reference to the platform device does not prevent
its driver data from going away so there is no point in keeping the
reference after the helper returns.
Fixes: 8cde3c2153e8 ("firmware: meson_sm: Rework driver as a proper platform driver")
Cc: stable@vger.kernel.org # 5.5
Cc: Carlo Caione <ccaione@baylibre.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20250725074019.8765-1-johan@kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/meson/meson_sm.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/firmware/meson/meson_sm.c b/drivers/firmware/meson/meson_sm.c index 9a2656d73600..b39f395c077e 100644 --- a/drivers/firmware/meson/meson_sm.c +++ b/drivers/firmware/meson/meson_sm.c @@ -225,11 +225,16 @@ EXPORT_SYMBOL(meson_sm_call_write); struct meson_sm_firmware *meson_sm_get(struct device_node *sm_node) { struct platform_device *pdev = of_find_device_by_node(sm_node); + struct meson_sm_firmware *fw; if (!pdev) return NULL; - return platform_get_drvdata(pdev); + fw = platform_get_drvdata(pdev); + + put_device(&pdev->dev); + + return fw; } EXPORT_SYMBOL_GPL(meson_sm_get); |