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firmware: raspberrypi: Fix a leak in 'rpi_firmware_get()'

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[ Upstream commit 09cbd1df7d2615c19e40facbe31fdcb5f1ebfa96 ]

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.

Add the corresponding 'put_device()' in the normal and error handling
paths.

Fixes: 4e3d60656a ("ARM: bcm2835: Add the Raspberry Pi firmware driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/5e17e5409b934cd08bf6f9279c73be5c1cb11cce.1628232242.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe JAILLET 2021-08-06 08:46:11 +02:00 committed by AuxXxilium
parent 037af66fba
commit c38f5e4c9a
1 changed files with 8 additions and 2 deletions
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10
drivers/firmware/raspberrypi.c
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@ -322,12 +322,18 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
fw = platform_get_drvdata(pdev);
if (!fw)
return NULL;
goto err_put_device;
if (!kref_get_unless_zero(&fw->consumers))
return NULL;
goto err_put_device;
put_device(&pdev->dev);
return fw;
err_put_device:
put_device(&pdev->dev);
return NULL;
}
EXPORT_SYMBOL_GPL(rpi_firmware_get);