firmware: raspberrypi: Keep count of all consumers

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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>

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This commit is contained in:

Nicolas Saenz Julienne 2021-01-18 13:32:34 +01:00

parent a38fd87484

commit 1e7c57355a

2 changed files with 39 additions and 3 deletions

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40

drivers/firmware/raspberrypi.c

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2

include/soc/bcm2835/raspberrypi-firmware.h

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