diff options
| author | Linus Torvalds | 2024-01-18 16:58:21 -0800 |
|---|---|---|
| committer | Linus Torvalds | 2024-01-18 16:58:21 -0800 |
| commit | 5c93506983626419fb8719a7301b53faea1e0bb3 (patch) | |
| tree | c54f852593ec7e02aa89e921ccca798cb73d4b65 | |
| parent | 21c91bb9367716f61f46a352aafdeda61cb91c73 (diff) | |
| parent | 9320fc509b87b4d795fb37112931e2f4f8b5c55f (diff) | |
Merge tag 'pwm/for-6.8-2' of gitolite.kernel.org:pub/scm/linux/kernel/git/ukleinek/linux
Pull pwm fixes from Uwe Kleine-König:
- fix a duplicate cleanup in an error path introduced in
this merge window
- fix an out-of-bounds access
In practise it doesn't happen - otherwise someone would have noticed
since v5.17-rc1 I guess - because the device tree binding for the two
drivers using of_pwm_single_xlate() only have args->args_count == 1.
A device-tree that doesn't conform to the respective bindings could
trigger that easily however.
- correct the request callback of the jz4740 pwm driver which used
dev_err_probe() long after .probe() completed.
This is conceptually wrong because dev_err_probe() might call
device_set_deferred_probe_reason() which is nonsensical after the
driver is bound.
* tag 'pwm/for-6.8-2' of gitolite.kernel.org:pub/scm/linux/kernel/git/ukleinek/linux:
pwm: jz4740: Don't use dev_err_probe() in .request()
pwm: Fix out-of-bounds access in of_pwm_single_xlate()
pwm: bcm2835: Remove duplicate call to clk_rate_exclusive_put()
| -rw-r--r-- | drivers/pwm/core.c | 2 | ||||
| -rw-r--r-- | drivers/pwm/pwm-bcm2835.c | 4 | ||||
| -rw-r--r-- | drivers/pwm/pwm-jz4740.c | 7 |
3 files changed, 6 insertions, 7 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 9a4c720c88aa..f2728ee787d7 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -152,7 +152,7 @@ of_pwm_single_xlate(struct pwm_chip *chip, const struct of_phandle_args *args) pwm->args.period = args->args[0]; pwm->args.polarity = PWM_POLARITY_NORMAL; - if (args->args_count == 2 && args->args[2] & PWM_POLARITY_INVERTED) + if (args->args_count == 2 && args->args[1] & PWM_POLARITY_INVERTED) pwm->args.polarity = PWM_POLARITY_INVERSED; return pwm; diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c index 307c0bd5f885..283cf27f25ba 100644 --- a/drivers/pwm/pwm-bcm2835.c +++ b/drivers/pwm/pwm-bcm2835.c @@ -160,10 +160,8 @@ static int bcm2835_pwm_probe(struct platform_device *pdev) ret = devm_add_action_or_reset(&pdev->dev, devm_clk_rate_exclusive_put, pc->clk); - if (ret) { - clk_rate_exclusive_put(pc->clk); + if (ret) return ret; - } pc->rate = clk_get_rate(pc->clk); if (!pc->rate) diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c index 80dcff237a15..3933418e551b 100644 --- a/drivers/pwm/pwm-jz4740.c +++ b/drivers/pwm/pwm-jz4740.c @@ -61,9 +61,10 @@ static int jz4740_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) snprintf(name, sizeof(name), "timer%u", pwm->hwpwm); clk = clk_get(chip->dev, name); - if (IS_ERR(clk)) - return dev_err_probe(chip->dev, PTR_ERR(clk), - "Failed to get clock\n"); + if (IS_ERR(clk)) { + dev_err(chip->dev, "error %pe: Failed to get clock\n", clk); + return PTR_ERR(clk); + } err = clk_prepare_enable(clk); if (err < 0) { |