From 036de8efae4b81f8e1504fab654070cecce6dfa9 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 8 Apr 2009 13:52:39 +0300 Subject: unreachable code in drms_uA_update() I removed the extra semi-colon and indented the return statement. The unreachable code was found by smatch (http://repo.or.cz/w/smatch.git). The patch was compile tested. regards, dan carpenter Signed-off-by: Dan Carpenter Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- drivers/regulator/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/regulator/core.c') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 01f7702a805d..47fc6e6fe9bc 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -540,8 +540,8 @@ static void drms_uA_update(struct regulator_dev *rdev) err = regulator_check_drms(rdev); if (err < 0 || !rdev->desc->ops->get_optimum_mode || - !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode); - return; + !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode) + return; /* get output voltage */ output_uV = rdev->desc->ops->get_voltage(rdev); -- cgit v1.2.2 From cd78dfc6c6e321a310a73ef7b0df3d262704dd55 Mon Sep 17 00:00:00 2001 From: Diego Liziero Date: Tue, 14 Apr 2009 03:04:47 +0200 Subject: drivers/regulator: fix when type is different from REGULATOR_VOLTAGE or REGULATOR_CURRENT When regulator_desc->type is something different from REGULATOR_VOLTAGE or REGULATOR_CURRENT the if should probably return ERR_PTR(-EINVAL) The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) @@ expression E; constant C; @@ ( - !E == C + E != C ) Signed-off-by: Diego Liziero Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- drivers/regulator/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/regulator/core.c') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 47fc6e6fe9bc..cb62be63caed 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2001,8 +2001,8 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, if (regulator_desc->name == NULL || regulator_desc->ops == NULL) return ERR_PTR(-EINVAL); - if (!regulator_desc->type == REGULATOR_VOLTAGE && - !regulator_desc->type == REGULATOR_CURRENT) + if (regulator_desc->type != REGULATOR_VOLTAGE && + regulator_desc->type != REGULATOR_CURRENT) return ERR_PTR(-EINVAL); if (!init_data) -- cgit v1.2.2 From 53032dafc6b93ac178ca2340ff8eb4ee2b3d1a92 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Sat, 25 Apr 2009 05:28:36 -0600 Subject: regulator core: fix double-free in regulator_register() error path During regulator registration, any error after device_register() will cause a double-free on the struct regulator_dev 'rdev'. The bug is in drivers/regulator/core.c:regulator_register(): ... scrub: device_unregister(&rdev->dev); clean: kfree(rdev); <--- rdev = ERR_PTR(ret); goto out; ... device_unregister() calls regulator_dev_release() which frees rdev. The subsequent kfree corrupts memory and causes some OMAP3 systems to oops on boot in regulator_get(). Applies against 2.6.30-rc3. Signed-off-by: Paul Walmsley Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- drivers/regulator/core.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/regulator/core.c') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index cb62be63caed..2f14c16f58c3 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2080,6 +2080,10 @@ out: scrub: device_unregister(&rdev->dev); + /* device core frees rdev */ + rdev = ERR_PTR(ret); + goto out; + clean: kfree(rdev); rdev = ERR_PTR(ret); -- cgit v1.2.2 From 3e59091828ed5406c879b899b4257fcef7271e2c Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 28 Apr 2009 11:09:38 +0100 Subject: regulator: Fix default constraints for fixed voltage regulators Default voltage constraints were being provided for fixed voltage regulator where board constraints were not provided but these constraints used INT_MIN as the default minimum voltage which is not a valid value since it is less than zero. Use 1uV instead. Also set the default values we set in the constraints themselves since otherwise the max_uV constraint we determine will not be stored in the actual constraint strucutre and will therefore not be used. Signed-off-by: Mark Brown Signed-off-by: Liam Girdwood --- drivers/regulator/core.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/regulator/core.c') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 2f14c16f58c3..98c3a74e9949 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -703,10 +703,13 @@ static int set_machine_constraints(struct regulator_dev *rdev, int cmin = constraints->min_uV; int cmax = constraints->max_uV; - /* it's safe to autoconfigure fixed-voltage supplies */ + /* it's safe to autoconfigure fixed-voltage supplies + and the constraints are used by list_voltage. */ if (count == 1 && !cmin) { - cmin = INT_MIN; + cmin = 1; cmax = INT_MAX; + constraints->min_uV = cmin; + constraints->max_uV = cmax; } /* voltage constraints are optional */ -- cgit v1.2.2