* [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data
@ 2020-06-23 1:24 Vincent Chen
2020-06-25 22:13 ` Palmer Dabbelt
0 siblings, 1 reply; 5+ messages in thread
From: Vincent Chen @ 2020-06-23 1:24 UTC (permalink / raw)
To: mturquette, sboyd, paul.walmsley, palmer
Cc: linux-riscv, schwab, Vincent Chen, stable
The (struct __prci_data).hw_clks.hws is an array with dynamic elements.
Using struct_size(pd, hw_clks.hws, ARRAY_SIZE(__prci_init_clocks))
instead of sizeof(*pd) to get the correct memory size of
struct __prci_data for sifive/fu540-prci. After applying this
modifications, the kernel runs smoothly with CONFIG_SLAB_FREELIST_RANDOM
enabled on the HiFive unleashed board.
Fixes: 30b8e27e3b58 ("clk: sifive: add a driver for the SiFive FU540 PRCI IP block")
Cc: stable@vger.kernel.org
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
---
drivers/clk/sifive/fu540-prci.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
index 6282ee2f361c..a8901f90a61a 100644
--- a/drivers/clk/sifive/fu540-prci.c
+++ b/drivers/clk/sifive/fu540-prci.c
@@ -586,7 +586,10 @@ static int sifive_fu540_prci_probe(struct platform_device *pdev)
struct __prci_data *pd;
int r;
- pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+ pd = devm_kzalloc(dev,
+ struct_size(pd, hw_clks.hws,
+ ARRAY_SIZE(__prci_init_clocks)),
+ GFP_KERNEL);
if (!pd)
return -ENOMEM;
--
2.7.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data
2020-06-23 1:24 [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data Vincent Chen
@ 2020-06-25 22:13 ` Palmer Dabbelt
2020-06-29 23:23 ` Stephen Boyd
0 siblings, 1 reply; 5+ messages in thread
From: Palmer Dabbelt @ 2020-06-25 22:13 UTC (permalink / raw)
To: vincent.chen
Cc: mturquette, sboyd, Paul Walmsley, linux-riscv, schwab,
vincent.chen, stable
On Mon, 22 Jun 2020 18:24:17 PDT (-0700), vincent.chen@sifive.com wrote:
> The (struct __prci_data).hw_clks.hws is an array with dynamic elements.
> Using struct_size(pd, hw_clks.hws, ARRAY_SIZE(__prci_init_clocks))
> instead of sizeof(*pd) to get the correct memory size of
> struct __prci_data for sifive/fu540-prci. After applying this
> modifications, the kernel runs smoothly with CONFIG_SLAB_FREELIST_RANDOM
> enabled on the HiFive unleashed board.
>
> Fixes: 30b8e27e3b58 ("clk: sifive: add a driver for the SiFive FU540 PRCI IP block")
> Cc: stable@vger.kernel.org
> Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
> ---
> drivers/clk/sifive/fu540-prci.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
> index 6282ee2f361c..a8901f90a61a 100644
> --- a/drivers/clk/sifive/fu540-prci.c
> +++ b/drivers/clk/sifive/fu540-prci.c
> @@ -586,7 +586,10 @@ static int sifive_fu540_prci_probe(struct platform_device *pdev)
> struct __prci_data *pd;
> int r;
>
> - pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
> + pd = devm_kzalloc(dev,
> + struct_size(pd, hw_clks.hws,
> + ARRAY_SIZE(__prci_init_clocks)),
> + GFP_KERNEL);
> if (!pd)
> return -ENOMEM;
This is on fixes, thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data
2020-06-25 22:13 ` Palmer Dabbelt
@ 2020-06-29 23:23 ` Stephen Boyd
2020-06-29 23:34 ` Palmer Dabbelt
0 siblings, 1 reply; 5+ messages in thread
From: Stephen Boyd @ 2020-06-29 23:23 UTC (permalink / raw)
To: Palmer Dabbelt, vincent.chen
Cc: mturquette, Paul Walmsley, linux-riscv, schwab, vincent.chen, stable
Quoting Palmer Dabbelt (2020-06-25 15:13:39)
> On Mon, 22 Jun 2020 18:24:17 PDT (-0700), vincent.chen@sifive.com wrote:
> > The (struct __prci_data).hw_clks.hws is an array with dynamic elements.
> > Using struct_size(pd, hw_clks.hws, ARRAY_SIZE(__prci_init_clocks))
> > instead of sizeof(*pd) to get the correct memory size of
> > struct __prci_data for sifive/fu540-prci. After applying this
> > modifications, the kernel runs smoothly with CONFIG_SLAB_FREELIST_RANDOM
> > enabled on the HiFive unleashed board.
> >
> > Fixes: 30b8e27e3b58 ("clk: sifive: add a driver for the SiFive FU540 PRCI IP block")
> > Cc: stable@vger.kernel.org
> > Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
> > ---
> > drivers/clk/sifive/fu540-prci.c | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
> > index 6282ee2f361c..a8901f90a61a 100644
> > --- a/drivers/clk/sifive/fu540-prci.c
> > +++ b/drivers/clk/sifive/fu540-prci.c
> > @@ -586,7 +586,10 @@ static int sifive_fu540_prci_probe(struct platform_device *pdev)
> > struct __prci_data *pd;
> > int r;
> >
> > - pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
> > + pd = devm_kzalloc(dev,
> > + struct_size(pd, hw_clks.hws,
> > + ARRAY_SIZE(__prci_init_clocks)),
> > + GFP_KERNEL);
> > if (!pd)
> > return -ENOMEM;
>
> This is on fixes, thanks!
Does that mean applied to sifive tree? I see it in next but only noticed
this by chance because it wasn't sent to the linux-clk mailing list.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data
2020-06-29 23:23 ` Stephen Boyd
@ 2020-06-29 23:34 ` Palmer Dabbelt
2020-06-29 23:37 ` Stephen Boyd
0 siblings, 1 reply; 5+ messages in thread
From: Palmer Dabbelt @ 2020-06-29 23:34 UTC (permalink / raw)
To: sboyd
Cc: vincent.chen, mturquette, Paul Walmsley, linux-riscv, schwab,
vincent.chen, stable
On Mon, 29 Jun 2020 16:23:47 PDT (-0700), sboyd@kernel.org wrote:
> Quoting Palmer Dabbelt (2020-06-25 15:13:39)
>> On Mon, 22 Jun 2020 18:24:17 PDT (-0700), vincent.chen@sifive.com wrote:
>> > The (struct __prci_data).hw_clks.hws is an array with dynamic elements.
>> > Using struct_size(pd, hw_clks.hws, ARRAY_SIZE(__prci_init_clocks))
>> > instead of sizeof(*pd) to get the correct memory size of
>> > struct __prci_data for sifive/fu540-prci. After applying this
>> > modifications, the kernel runs smoothly with CONFIG_SLAB_FREELIST_RANDOM
>> > enabled on the HiFive unleashed board.
>> >
>> > Fixes: 30b8e27e3b58 ("clk: sifive: add a driver for the SiFive FU540 PRCI IP block")
>> > Cc: stable@vger.kernel.org
>> > Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
>> > ---
>> > drivers/clk/sifive/fu540-prci.c | 5 ++++-
>> > 1 file changed, 4 insertions(+), 1 deletion(-)
>> >
>> > diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
>> > index 6282ee2f361c..a8901f90a61a 100644
>> > --- a/drivers/clk/sifive/fu540-prci.c
>> > +++ b/drivers/clk/sifive/fu540-prci.c
>> > @@ -586,7 +586,10 @@ static int sifive_fu540_prci_probe(struct platform_device *pdev)
>> > struct __prci_data *pd;
>> > int r;
>> >
>> > - pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
>> > + pd = devm_kzalloc(dev,
>> > + struct_size(pd, hw_clks.hws,
>> > + ARRAY_SIZE(__prci_init_clocks)),
>> > + GFP_KERNEL);
>> > if (!pd)
>> > return -ENOMEM;
>>
>> This is on fixes, thanks!
>
> Does that mean applied to sifive tree? I see it in next but only noticed
> this by chance because it wasn't sent to the linux-clk mailing list.
Sorry, I was going a bit too fast and didn't realize this wasn't in arch/riscv/
so I didn't wait for an ack. I put it on my fixes branch, which is what I sent
for the RCs. That's merged into linux-next as well, as far as I understand
that's the normal way to do things. It ended up in Linus' tree as d0a5fdf4cc83
("clk: sifive: allocate sufficient memory for struct __prci_data"), which is in
rc3.
We don't really have a SiFive tree, the SiFive stuff just goes in through the
RISC-V tree. In theory I've been meaning to split them up for a while, but
given the maintainers are the same I just never got around to doing so.
LMK if I screwed something up.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data
2020-06-29 23:34 ` Palmer Dabbelt
@ 2020-06-29 23:37 ` Stephen Boyd
0 siblings, 0 replies; 5+ messages in thread
From: Stephen Boyd @ 2020-06-29 23:37 UTC (permalink / raw)
To: Palmer Dabbelt
Cc: vincent.chen, mturquette, Paul Walmsley, linux-riscv, schwab,
vincent.chen, stable
Quoting Palmer Dabbelt (2020-06-29 16:34:10)
> On Mon, 29 Jun 2020 16:23:47 PDT (-0700), sboyd@kernel.org wrote:
> >
> > Does that mean applied to sifive tree? I see it in next but only noticed
> > this by chance because it wasn't sent to the linux-clk mailing list.
>
> Sorry, I was going a bit too fast and didn't realize this wasn't in arch/riscv/
> so I didn't wait for an ack. I put it on my fixes branch, which is what I sent
> for the RCs. That's merged into linux-next as well, as far as I understand
> that's the normal way to do things. It ended up in Linus' tree as d0a5fdf4cc83
> ("clk: sifive: allocate sufficient memory for struct __prci_data"), which is in
> rc3.
>
> We don't really have a SiFive tree, the SiFive stuff just goes in through the
> RISC-V tree. In theory I've been meaning to split them up for a while, but
> given the maintainers are the same I just never got around to doing so.
>
> LMK if I screwed something up.
No worries. I would have noticed this patch earlier if it had been sent
to the linux-clk mailing list which I use to catch patches that should
be reviewed for the clk tree. I'm not overly concerned. Thanks.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-06-23 1:24 [PATCH] clk: sifive: allocate sufficient memory for struct __prci_data Vincent Chen
2020-06-25 22:13 ` Palmer Dabbelt
2020-06-29 23:23 ` Stephen Boyd
2020-06-29 23:34 ` Palmer Dabbelt
2020-06-29 23:37 ` Stephen Boyd
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