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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2018-04-08 11:05:15 +0200 |
|---|---|---|
| committer | Florian Fainelli <f.fainelli@gmail.com> | 2018-04-16 15:15:23 -0700 |
| commit | 144345a4a8c3b497a3f60d3af9d6071a37660186 (patch) | |
| tree | 333e49ca8377ef983ba5c93b51cabba3951a401d /include/soc | |
| parent | 0a12e80ce4230434c2ed66ad0d65af0b7ccecea8 (diff) | |
| download | linux-144345a4a8c3b497a3f60d3af9d6071a37660186.tar.gz linux-144345a4a8c3b497a3f60d3af9d6071a37660186.tar.bz2 linux-144345a4a8c3b497a3f60d3af9d6071a37660186.zip | |
soc: bcm2835: Make !RASPBERRYPI_FIRMWARE dummies return failure
If CONFIG_RASPBERRYPI_FIRMWARE=n:
drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_polarity’:
drivers/gpio/gpio-raspberrypi-exp.c:71: warning: ‘get.polarity’ is used uninitialized in this function
drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_direction’:
drivers/gpio/gpio-raspberrypi-exp.c:150: warning: ‘get.direction’ is used uninitialized in this function
The dummy firmware interface functions return 0, which means success,
causing subsequent code to make use of the never initialized output
parameter.
Fix this by making the dummy functions return an error code (-ENOSYS)
instead.
Note that this assumes the firmware always fills in the requested data
in the CONFIG_RASPBERRYPI_FIRMWARE=y case.
Fixes: d45f1a563b92dac7 ("staging: vc04_services: fix up rpi firmware functions")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'include/soc')
| -rw-r--r-- | include/soc/bcm2835/raspberrypi-firmware.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h index 50df5b28d2c9..8ee8991aa099 100644 --- a/include/soc/bcm2835/raspberrypi-firmware.h +++ b/include/soc/bcm2835/raspberrypi-firmware.h @@ -143,13 +143,13 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node); static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag, void *data, size_t len) { - return 0; + return -ENOSYS; } static inline int rpi_firmware_property_list(struct rpi_firmware *fw, void *data, size_t tag_size) { - return 0; + return -ENOSYS; } static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node) |