Re: [PATCH 21/24] usb: host: xhci: Move array of structs from the stack onto the heap

[Lee Jones]

On Wed, 26 May 2021, Sergei Shtylyov wrote:

> On 5/26/21 5:44 PM, Lee Jones wrote:
> 
> [...]
> >>> Fixes the following W=1 kernel build warning(s):
> >>>
> >>>  drivers/usb/host/xhci.c: In function ‘xhci_reserve_bandwidth’:
> >>>  drivers/usb/host/xhci.c:2859:1: warning: the frame size of 1032 bytes is larger than 1024 bytes [-Wframe-larger-than=]
> >>>
> >>> Cc: Mathias Nyman <mathias.nyman@xxxxxxxxx>
> >>> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> >>> Cc: linux-usb@xxxxxxxxxxxxxxx
> >>> Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
> >>> ---
> >>>  drivers/usb/host/xhci.c | 8 +++++++-
> >>>  1 file changed, 7 insertions(+), 1 deletion(-)
> >>>
> >>> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> >>> index ac2a7d4288883..40ce4b4eb12ad 100644
> >>> --- a/drivers/usb/host/xhci.c
> >>> +++ b/drivers/usb/host/xhci.c
> >> [...]
> >>> @@ -2788,6 +2788,10 @@ static int xhci_reserve_bandwidth(struct xhci_hcd *xhci,
> >>>  		return -ENOMEM;
> >>>  	}
> >>>  
> >>> +	ep_bw_info = kzalloc(sizeof(*ep_bw_info) * 31, GFP_KERNEL);
> >>
> >>    Why not kcalloc()?
> > 
> > No particular reason.  Muscle memory I guess.
> > 
> > Happy either way.
> 
>     kcalloc( is designed for allocatiung arrays and clearing them, like calloc(),
> so let's stick wuth it...

No problem.  Will fix.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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