[PATCH] mips:sgi-ip22:Check return value from kzalloc

[PATCH] mips:sgi-ip22:Check return value from kzalloc

[RAGHU Halharvi]

Signed-off-by: RAGHU Halharvi <raghuhack78@gmail.com>
---
 arch/mips/sgi-ip22/ip22-gio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
index b225033aade6..5aaf40a1743b 100644
--- a/arch/mips/sgi-ip22/ip22-gio.c
+++ b/arch/mips/sgi-ip22/ip22-gio.c
@@ -363,6 +363,8 @@ static void ip22_check_gio(int slotno, unsigned long addr, int irq)
 		printk(KERN_INFO "GIO: slot %d : %s (id %x)\n",
 		       slotno, name, id);
 		gio_dev = kzalloc(sizeof *gio_dev, GFP_KERNEL);
+		if (!gio_dev)
+			return -ENOMEM;
 		gio_dev->name = name;
 		gio_dev->slotno = slotno;
 		gio_dev->id.id = id;
-- 
2.17.1

Re: [PATCH] mips:sgi-ip22:Check return value from kzalloc

[Paul Burton]

Hi Raghu,

On Tue, Jul 17, 2018 at 05:11:45PM +0530, RAGHU Halharvi wrote:
> Signed-off-by: RAGHU Halharvi <raghuhack78@gmail.com>
> ---
>  arch/mips/sgi-ip22/ip22-gio.c | 2 ++
>  1 file changed, 2 insertions(+)

You should write a commit message, even for trivial patches, which
describes the motivation for the patch. For more complex patches it
should also explain how the changes being made solve a problem, or
clarify anything non-obvious about the way the patched code works.

In general, read Documentation/process/submitting-patches.rst

> diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
> index b225033aade6..5aaf40a1743b 100644
> --- a/arch/mips/sgi-ip22/ip22-gio.c
> +++ b/arch/mips/sgi-ip22/ip22-gio.c
> @@ -363,6 +363,8 @@ static void ip22_check_gio(int slotno, unsigned long addr, int irq)
>  		printk(KERN_INFO "GIO: slot %d : %s (id %x)\n",
>  		       slotno, name, id);
>  		gio_dev = kzalloc(sizeof *gio_dev, GFP_KERNEL);
> +		if (!gio_dev)
> +			return -ENOMEM;

One especially important point for patches like this one is to make sure
that your code at least compiles. In this case you try to return an
error code from a function that returns void, which won't work.

Thanks,
    Paul