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| author | Nicolas Saenz Julienne <nsaenzjulienne@suse.de> | 2021-01-18 13:32:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-15 09:50:41 +0200 |
| commit | 60831f5ae6c713afceb6d29f40899ed112f36059 (patch) | |
| tree | 081d4dd0cc7bbf7e02a5667c9c87ab1f84faaae3 /include | |
| parent | 5c68b7795b4c7bdbd54148c9343b5a5edeb476d7 (diff) | |
| download | linux-stable-60831f5ae6c713afceb6d29f40899ed112f36059.tar.gz linux-stable-60831f5ae6c713afceb6d29f40899ed112f36059.tar.bz2 linux-stable-60831f5ae6c713afceb6d29f40899ed112f36059.zip | |
firmware: raspberrypi: Keep count of all consumers
[ Upstream commit 1e7c57355a3bc617fc220234889e49fe722a6305 ]
When unbinding the firmware device we need to make sure it has no
consumers left. Otherwise we'd leave them with a firmware handle
pointing at freed memory.
Keep a reference count of all consumers and introduce rpi_firmware_put()
which will permit automatically decrease the reference count upon
unbinding consumer drivers.
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/soc/bcm2835/raspberrypi-firmware.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h index cc9cdbc66403..fdfef7fe40df 100644 --- a/include/soc/bcm2835/raspberrypi-firmware.h +++ b/include/soc/bcm2835/raspberrypi-firmware.h @@ -140,6 +140,7 @@ int rpi_firmware_property(struct rpi_firmware *fw, u32 tag, void *data, size_t len); int rpi_firmware_property_list(struct rpi_firmware *fw, void *data, size_t tag_size); +void rpi_firmware_put(struct rpi_firmware *fw); struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node); #else static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag, @@ -154,6 +155,7 @@ static inline int rpi_firmware_property_list(struct rpi_firmware *fw, return -ENOSYS; } +static inline void rpi_firmware_put(struct rpi_firmware *fw) { } static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node) { return NULL; |