Re: [PATCH v2] i2c: cp2615: handle allocation failure

[Andi Shyti <andi.shyti@kernel.org>]

Hi Triet,

thank you for your patch.

On Tue, Aug 18, 2026 at 11:17:01AM +0000, Triet Hoang wrote:
> Check the result of kzalloc_obj() and return -ENOMEM
> when the allocation fails instead of passing a NULL pointer
> to the message initialization helpers, which would return -EINVAL.
> 
> Signed-off-by: Triet Hoang <triet.hoang.dev@gmail.com>
> ---
> Changes in v2:
> - Clarify the commit message to describe the actual behavior change.
> - Fix coding style regression

Next time please don't send your v2 as in reply to v1. It
confuses me.

> ---
>  drivers/i2c/busses/i2c-cp2615.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/i2c/busses/i2c-cp2615.c b/drivers/i2c/busses/i2c-cp2615.c
> index 951de6249834..c1275fcad636 100644
> --- a/drivers/i2c/busses/i2c-cp2615.c
> +++ b/drivers/i2c/busses/i2c-cp2615.c
> @@ -128,6 +128,9 @@ cp2615_i2c_send(struct usb_interface *usbif, struct cp2615_i2c_transfer *i2c_w)
>  	struct usb_device *usbdev = interface_to_usbdev(usbif);
>  	int res = cp2615_init_i2c_msg(msg, i2c_w);
>  
> +	if (!msg)
> +		return -ENOMEM;
> +

Your patch looks good, but, as you are at it, can I ask you here
a little effort? Personally I don't like and I find unreadable
the form:

	struct cp2615_iop_msg *msg = kzalloc_obj(*msg);
	...

	if (!msg)
		return -ENOMEM.

Important assignments, like kzalloc_*(), shouldn't be made during
declaration. I prefer the form:

	
	struct cp2615_iop_msg *msg;
	...

	msg = kzalloc_obj(*msg);
	if (!msg)
		return -ENOMEM.

Works for you? Do you mind updating in v3?

Thanks,
Andi

>  	if (!res)
>  		res = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, IOP_EP_OUT),
>  				   msg, ntohs(msg->length), NULL, 0);