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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2019-11-11 10:03:55 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2020-01-20 12:31:19 +0100 |
| commit | c4cf7aa57eb83b108d2d9c6c37c143388fee2a4d (patch) | |
| tree | cd24641ffe54ed6a4c7e8c19a9bf1bd46dbc161a | |
| parent | 43efdc8f0e6d7088ec61bd55a73bf853f002d043 (diff) | |
| download | linux-c4cf7aa57eb83b108d2d9c6c37c143388fee2a4d.tar.bz2 | |
pwm: omap-dmtimer: Simplify error handling
Instead of doing error handling in the middle of ->probe(), move error
handling and freeing the reference to timer to the end.
This fixes a resource leak as dm_timer wasn't freed when allocating
*omap failed.
Implementation note: The put: label was never reached without a goto and
ret being unequal to 0, so the removed return statement is fine.
Fixes: 6604c6556db9 ("pwm: Add PWM driver for OMAP using dual-mode timers")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| -rw-r--r-- | drivers/pwm/pwm-omap-dmtimer.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c index bdf94c78655f..e36fcad668a6 100644 --- a/drivers/pwm/pwm-omap-dmtimer.c +++ b/drivers/pwm/pwm-omap-dmtimer.c @@ -298,15 +298,10 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev) goto put; } -put: - of_node_put(timer); - if (ret < 0) - return ret; - omap = devm_kzalloc(&pdev->dev, sizeof(*omap), GFP_KERNEL); if (!omap) { - pdata->free(dm_timer); - return -ENOMEM; + ret = -ENOMEM; + goto err_alloc_omap; } omap->pdata = pdata; @@ -339,13 +334,28 @@ put: ret = pwmchip_add(&omap->chip); if (ret < 0) { dev_err(&pdev->dev, "failed to register PWM\n"); - omap->pdata->free(omap->dm_timer); - return ret; + goto err_pwmchip_add; } + of_node_put(timer); + platform_set_drvdata(pdev, omap); return 0; + +err_pwmchip_add: + + /* + * *omap is allocated using devm_kzalloc, + * so no free necessary here + */ +err_alloc_omap: + + pdata->free(dm_timer); +put: + of_node_put(timer); + + return ret; } static int pwm_omap_dmtimer_remove(struct platform_device *pdev) |