2021-12-10 17:13:06

by Jim Quinlan

Subject: [PATCH v1] of: unittest: fix warning on PowerPC frame size warning

The struct device variable "dev_bogus" was triggering this warning
on a PowerPC build:

drivers/of/unittest.c: In function 'of_unittest_dma_ranges_one.constprop':
[...] >> The frame size of 1424 bytes is larger than 1024 bytes
[-Wframe-larger-than=]

This variable is now dynamically allocated.

Fixes: e0d072782c734 ("dma-mapping: introduce DMA range map, supplanting dma_pfn_offset")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Jim Quinlan <[email protected]>
---
drivers/of/unittest.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 481ba8682ebf..945cda299a63 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -911,11 +911,18 @@ static void __init of_unittest_dma_ranges_one(const char *path,
if (!rc) {
phys_addr_t paddr;
dma_addr_t dma_addr;
- struct device dev_bogus;
+ struct device *dev_bogus;

- dev_bogus.dma_range_map = map;
- paddr = dma_to_phys(&dev_bogus, expect_dma_addr);
- dma_addr = phys_to_dma(&dev_bogus, expect_paddr);
+ dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
+ if (!dev_bogus) {
+ unittest(0, "kzalloc() failed\n");
+ kfree(map);
+ return;
+ }
+
+ dev_bogus->dma_range_map = map;
+ paddr = dma_to_phys(dev_bogus, expect_dma_addr);
+ dma_addr = phys_to_dma(dev_bogus, expect_paddr);

unittest(paddr == expect_paddr,
"of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",

base-commit: c741e49150dbb0c0aebe234389f4aa8b47958fa8
--
2.17.1

2021-12-10 18:27:06

by Florian Fainelli

Subject: Re: [PATCH v1] of: unittest: fix warning on PowerPC frame size warning

On 12/10/21 9:12 AM, Jim Quinlan wrote:
> The struct device variable "dev_bogus" was triggering this warning
> on a PowerPC build:
>
> drivers/of/unittest.c: In function 'of_unittest_dma_ranges_one.constprop':
> [...] >> The frame size of 1424 bytes is larger than 1024 bytes
> [-Wframe-larger-than=]
>
> This variable is now dynamically allocated.
>
> Fixes: e0d072782c734 ("dma-mapping: introduce DMA range map, supplanting dma_pfn_offset")
> Reported-by: kernel test robot <[email protected]>
> Signed-off-by: Jim Quinlan <[email protected]>
> ---
> drivers/of/unittest.c | 15 +++++++++++----
> 1 file changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 481ba8682ebf..945cda299a63 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -911,11 +911,18 @@ static void __init of_unittest_dma_ranges_one(const char *path,
> if (!rc) {
> phys_addr_t paddr;
> dma_addr_t dma_addr;
> - struct device dev_bogus;
> + struct device *dev_bogus;
>
> - dev_bogus.dma_range_map = map;
> - paddr = dma_to_phys(&dev_bogus, expect_dma_addr);
> - dma_addr = phys_to_dma(&dev_bogus, expect_paddr);
> + dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
> + if (!dev_bogus) {
> + unittest(0, "kzalloc() failed\n");
> + kfree(map);
> + return;
> + }

You are leaking dev_bogus here.
--
Florian