On Wed, Mar 7, 2012 at 1:20 PM, Sascha Hauer <s.ha...@pengutronix.de> wrote: > On Sat, Mar 03, 2012 at 12:29:01AM -0800, Mike Turquette wrote: >> +struct clk *clk_register_divider(struct device *dev, const char *name, >> + const char *parent_name, unsigned long flags, >> + void __iomem *reg, u8 shift, u8 width, >> + u8 clk_divider_flags, spinlock_t *lock) >> +{ >> + struct clk_divider *div; >> + char **parent_names = NULL; >> + u8 len; >> + >> + div = kmalloc(sizeof(struct clk_divider), GFP_KERNEL); >> + >> + if (!div) { >> + pr_err("%s: could not allocate divider clk\n", __func__); >> + return ERR_PTR(-ENOMEM); >> + } >> + >> + /* struct clk_divider assignments */ >> + div->reg = reg; >> + div->shift = shift; >> + div->width = width; >> + div->flags = clk_divider_flags; >> + div->lock = lock; >> + >> + if (parent_name) { >> + parent_names = kmalloc(sizeof(char *), GFP_KERNEL); >> + >> + if (! parent_names) >> + goto out; >> + >> + len = sizeof(char) * strlen(parent_name); >> + >> + parent_names[0] = kmalloc(len, GFP_KERNEL); >> + >> + if (!parent_names[0]) >> + goto out; >> + >> + strncpy(parent_names[0], parent_name, len); >> + } >> + >> +out: >> + return clk_register(dev, name, >> + &clk_divider_ops, &div->hw, >> + parent_names, >> + (parent_name ? 1 : 0), >> + flags); >> +} > > clk_register_divider and also clk_register_gate have some problems. > First you allocate memory with exactly the string length without > the terminating 0. Then the functions leak memory when clk_register > fails. Could you fold in the following patch to fix this?
Thanks for the patch Sascha. This has been pulled into v6 and tested. Regards, Mike > > Sascha > > 8<-------------------------------------------------- > > fix divider/gate registration > > Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de> > --- > drivers/clk/clk-divider.c | 34 +++++++++++++++------------------- > drivers/clk/clk-gate.c | 33 ++++++++++++++------------------- > include/linux/clk-provider.h | 2 ++ > 3 files changed, 31 insertions(+), 38 deletions(-) > > diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c > index 8f02930..99b6b55 100644 > --- a/drivers/clk/clk-divider.c > +++ b/drivers/clk/clk-divider.c > @@ -156,14 +156,13 @@ struct clk *clk_register_divider(struct device *dev, > const char *name, > u8 clk_divider_flags, spinlock_t *lock) > { > struct clk_divider *div; > - char **parent_names = NULL; > - u8 len; > + struct clk *clk; > > - div = kmalloc(sizeof(struct clk_divider), GFP_KERNEL); > + div = kzalloc(sizeof(struct clk_divider), GFP_KERNEL); > > if (!div) { > pr_err("%s: could not allocate divider clk\n", __func__); > - return ERR_PTR(-ENOMEM); > + return NULL; > } > > /* struct clk_divider assignments */ > @@ -174,25 +173,22 @@ struct clk *clk_register_divider(struct device *dev, > const char *name, > div->lock = lock; > > if (parent_name) { > - parent_names = kmalloc(sizeof(char *), GFP_KERNEL); > - > - if (! parent_names) > - goto out; > - > - len = sizeof(char) * strlen(parent_name); > - > - parent_names[0] = kmalloc(len, GFP_KERNEL); > - > - if (!parent_names[0]) > + div->parent[0] = kstrdup(parent_name, GFP_KERNEL); > + if (!div->parent[0]) > goto out; > - > - strncpy(parent_names[0], parent_name, len); > } > > -out: > - return clk_register(dev, name, > + clk = clk_register(dev, name, > &clk_divider_ops, &div->hw, > - parent_names, > + div->parent, > (parent_name ? 1 : 0), > flags); > + if (clk) > + return clk; > + > +out: > + kfree(div->parent[0]); > + kfree(div); > + > + return NULL; > } > diff --git a/drivers/clk/clk-gate.c b/drivers/clk/clk-gate.c > index e831f7b..92c0489 100644 > --- a/drivers/clk/clk-gate.c > +++ b/drivers/clk/clk-gate.c > @@ -80,14 +80,13 @@ struct clk *clk_register_gate(struct device *dev, const > char *name, > u8 clk_gate_flags, spinlock_t *lock) > { > struct clk_gate *gate; > - char **parent_names = NULL; > - u8 len; > + struct clk *clk; > > - gate = kmalloc(sizeof(struct clk_gate), GFP_KERNEL); > + gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); > > if (!gate) { > pr_err("%s: could not allocate gated clk\n", __func__); > - return ERR_PTR(-ENOMEM); > + return NULL; > } > > /* struct clk_gate assignments */ > @@ -97,25 +96,21 @@ struct clk *clk_register_gate(struct device *dev, const > char *name, > gate->lock = lock; > > if (parent_name) { > - parent_names = kmalloc(sizeof(char *), GFP_KERNEL); > - > - if (! parent_names) > - goto out; > - > - len = sizeof(char) * strlen(parent_name); > - > - parent_names[0] = kmalloc(len, GFP_KERNEL); > - > - if (!parent_names[0]) > + gate->parent[0] = kstrdup(parent_name, GFP_KERNEL); > + if (!gate->parent[0]) > goto out; > - > - strncpy(parent_names[0], parent_name, len); > } > > -out: > - return clk_register(dev, name, > + clk = clk_register(dev, name, > &clk_gate_ops, &gate->hw, > - parent_names, > + gate->parent, > (parent_name ? 1 : 0), > flags); > + if (clk) > + return clk; > +out: > + kfree(gate->parent[0]); > + kfree(gate); > + > + return NULL; > } > diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h > index 9b7dd5e..ed1f918 100644 > --- a/include/linux/clk-provider.h > +++ b/include/linux/clk-provider.h > @@ -174,6 +174,7 @@ struct clk_gate { > u8 bit_idx; > u8 flags; > spinlock_t *lock; > + char *parent[1]; > }; > > #define CLK_GATE_SET_TO_DISABLE BIT(0) > @@ -210,6 +211,7 @@ struct clk_divider { > u8 width; > u8 flags; > spinlock_t *lock; > + char *parent[1]; > }; > > #define CLK_DIVIDER_ONE_BASED BIT(0) > -- > 1.7.9.1 > > -- > Pengutronix e.K. | | > Industrial Linux Solutions | http://www.pengutronix.de/ | > Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev