* [PATCH] parisc: handle failure of kmalloc in ccio_init_resources
@ 2022-08-19 4:15 Li Qiong
2022-08-19 19:30 ` Helge Deller
0 siblings, 1 reply; 2+ messages in thread
From: Li Qiong @ 2022-08-19 4:15 UTC (permalink / raw)
To: James E . J . Bottomley, Helge Deller
Cc: linux-parisc, linux-kernel, yuzhe, Li Qiong
As the possible failure of the kmalloc(), it should be better
to fix this error path, check and return '-ENOMEM' error code.
Signed-off-by: Li Qiong <liqiong@nfschina.com>
---
drivers/parisc/ccio-dma.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index 9be007c9420f..f69ab90b5e22 100644
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -1380,15 +1380,17 @@ ccio_init_resource(struct resource *res, char *name, void __iomem *ioaddr)
}
}
-static void __init ccio_init_resources(struct ioc *ioc)
+static int __init ccio_init_resources(struct ioc *ioc)
{
struct resource *res = ioc->mmio_region;
char *name = kmalloc(14, GFP_KERNEL);
-
+ if (unlikely(!name))
+ return -ENOMEM;
snprintf(name, 14, "GSC Bus [%d/]", ioc->hw_path);
ccio_init_resource(res, name, &ioc->ioc_regs->io_io_low);
ccio_init_resource(res + 1, name, &ioc->ioc_regs->io_io_low_hv);
+ return 0;
}
static int new_ioc_area(struct resource *res, unsigned long size,
@@ -1543,7 +1545,10 @@ static int __init ccio_probe(struct parisc_device *dev)
return -ENOMEM;
}
ccio_ioc_init(ioc);
- ccio_init_resources(ioc);
+ if (ccio_init_resources(ioc)) {
+ kfree(ioc);
+ return -ENOMEM;
+ }
hppa_dma_ops = &ccio_ops;
hba = kzalloc(sizeof(*hba), GFP_KERNEL);
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] parisc: handle failure of kmalloc in ccio_init_resources
2022-08-19 4:15 [PATCH] parisc: handle failure of kmalloc in ccio_init_resources Li Qiong
@ 2022-08-19 19:30 ` Helge Deller
0 siblings, 0 replies; 2+ messages in thread
From: Helge Deller @ 2022-08-19 19:30 UTC (permalink / raw)
To: Li Qiong, James E . J . Bottomley; +Cc: linux-parisc, linux-kernel, yuzhe
On 8/19/22 06:15, Li Qiong wrote:
> As the possible failure of the kmalloc(), it should be better
> to fix this error path, check and return '-ENOMEM' error code.
>
> Signed-off-by: Li Qiong <liqiong@nfschina.com>
applied.
Thanks!
Helge
> ---
> drivers/parisc/ccio-dma.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
> index 9be007c9420f..f69ab90b5e22 100644
> --- a/drivers/parisc/ccio-dma.c
> +++ b/drivers/parisc/ccio-dma.c
> @@ -1380,15 +1380,17 @@ ccio_init_resource(struct resource *res, char *name, void __iomem *ioaddr)
> }
> }
>
> -static void __init ccio_init_resources(struct ioc *ioc)
> +static int __init ccio_init_resources(struct ioc *ioc)
> {
> struct resource *res = ioc->mmio_region;
> char *name = kmalloc(14, GFP_KERNEL);
> -
> + if (unlikely(!name))
> + return -ENOMEM;
> snprintf(name, 14, "GSC Bus [%d/]", ioc->hw_path);
>
> ccio_init_resource(res, name, &ioc->ioc_regs->io_io_low);
> ccio_init_resource(res + 1, name, &ioc->ioc_regs->io_io_low_hv);
> + return 0;
> }
>
> static int new_ioc_area(struct resource *res, unsigned long size,
> @@ -1543,7 +1545,10 @@ static int __init ccio_probe(struct parisc_device *dev)
> return -ENOMEM;
> }
> ccio_ioc_init(ioc);
> - ccio_init_resources(ioc);
> + if (ccio_init_resources(ioc)) {
> + kfree(ioc);
> + return -ENOMEM;
> + }
> hppa_dma_ops = &ccio_ops;
>
> hba = kzalloc(sizeof(*hba), GFP_KERNEL);
^ permalink raw reply [flat|nested] 2+ messages in thread
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