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| author | Colin Ian King <colin.king@canonical.com> | 2021-02-16 15:16:26 +0000 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2021-02-16 19:05:23 +0100 |
| commit | 74369d041a0a3e9e57de50efd4bd4bc10564e254 (patch) | |
| tree | 7d11ff927673685544b2d1a9bfcc21f2b04cb55a /drivers/thermal | |
| parent | ca66dca5eda6bd16b7b27fed2a034f2396df5627 (diff) | |
| download | linux-74369d041a0a3e9e57de50efd4bd4bc10564e254.tar.gz linux-74369d041a0a3e9e57de50efd4bd4bc10564e254.tar.bz2 linux-74369d041a0a3e9e57de50efd4bd4bc10564e254.zip | |
thermal: qcom: Fix comparison with uninitialized variable channels_available
Currently the check of chip->channels[i].channel is against an the
uninitialized variable channels_available. I believe the variable
channels_available needs to be fetched first by the call to adc_tm5_read
before the channels check. Fix the issue swapping the order of the
channels check loop with the call to adc_tm5_read.
Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: ca66dca5eda6 ("thermal: qcom: add support for adc-tm5 PMIC thermal monitor")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210216151626.162996-1-colin.king@canonical.com
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/qcom/qcom-spmi-adc-tm5.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c index a2014375587d..b460b56e981c 100644 --- a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c +++ b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c @@ -375,13 +375,6 @@ static int adc_tm5_init(struct adc_tm5_chip *chip) int ret; unsigned int i; - for (i = 0; i < chip->nchannels; i++) { - if (chip->channels[i].channel >= channels_available) { - dev_err(chip->dev, "Invalid channel %d\n", chip->channels[i].channel); - return -EINVAL; - } - } - ret = adc_tm5_read(chip, ADC_TM5_NUM_BTM, &channels_available, sizeof(channels_available)); if (ret) { @@ -389,6 +382,13 @@ static int adc_tm5_init(struct adc_tm5_chip *chip) return ret; } + for (i = 0; i < chip->nchannels; i++) { + if (chip->channels[i].channel >= channels_available) { + dev_err(chip->dev, "Invalid channel %d\n", chip->channels[i].channel); + return -EINVAL; + } + } + buf[0] = chip->decimation; buf[1] = chip->avg_samples | ADC_TM5_FAST_AVG_EN; buf[2] = ADC_TM5_TIMER1; |