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| author |   Marijn Suijten <marijn.suijten@somainline.org> | 2021-11-15 21:34:52 +0100 |
|---|---|---|
| committer |   Lee Jones <lee.jones@linaro.org> | 2021-12-22 11:15:35 +0000 |
| commit | e29e24bdabfeddbf8b1a4ecac1af439a85150438 (patch) | |
| tree | 67a8f4819b5affb82282a4d9aaeb665d6828f38e /drivers/video | |
| parent | backlight: qcom-wled: Validate enabled string indices in DT (diff) | |
| download | linux-dev-e29e24bdabfeddbf8b1a4ecac1af439a85150438.tar.xz linux-dev-e29e24bdabfeddbf8b1a4ecac1af439a85150438.zip | |
backlight: qcom-wled: Pass number of elements to read to read_u32_array
of_property_read_u32_array takes the number of elements to read as last
argument. This does not always need to be 4 (sizeof(u32)) but should
instead be the size of the array in DT as read just above with
of_property_count_elems_of_size.
To not make such an error go unnoticed again the driver now bails
accordingly when of_property_read_u32_array returns an error.
Surprisingly the indentation of newlined arguments is lining up again
after prepending `rc = `.
Fixes: 775d2ffb4af6 ("backlight: qcom-wled: Restructure the driver for WLED3")
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211115203459.1634079-3-marijn.suijten@somainline.org
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/backlight/qcom-wled.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 8a42ed89c59c..d413b913fef3 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -1535,10 +1535,15 @@ static int wled_configure(struct wled *wled) return -EINVAL; } - of_property_read_u32_array(dev->of_node, + rc = of_property_read_u32_array(dev->of_node, "qcom,enabled-strings", wled->cfg.enabled_strings, - sizeof(u32)); + string_len); + if (rc) { + dev_err(dev, "Failed to read %d elements from qcom,enabled-strings: %d\n", + string_len, rc); + return rc; + } for (i = 0; i < string_len; ++i) { if (wled->cfg.enabled_strings[i] >= wled->max_string_count) { |