[PATCH v2 22/71] efi: Improve logging in efi_disk

[Tom Rini]

On Fri, Jan 13, 2023 at 09:35:36PM +0100, Heinrich Schuchardt wrote:
> On 1/8/23 03:49, Simon Glass wrote:
> > When this fails it can be time-consuming to debug. Add some debugging
> > to help with this. Also try to return error codes instead of just using
> > -1.
> > 
> > Signed-off-by: Simon Glass <sjg at chromium.org>
> > ---
> > 
> > (no changes since v1)
> > 
> >   lib/efi_loader/efi_disk.c | 30 +++++++++++++++++++++---------
> >   1 file changed, 21 insertions(+), 9 deletions(-)
> > 
> > diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
> > index 7ea0334083f..37123dd2474 100644
> > --- a/lib/efi_loader/efi_disk.c
> > +++ b/lib/efi_loader/efi_disk.c
> > @@ -421,13 +421,16 @@ static efi_status_t efi_disk_add_dev(
> > 
> >   		if (!node) {
> >   			ret = EFI_OUT_OF_RESOURCES;
> > +			log_debug("no node\n");
> 
> Please, provide a descriptive message. I would not know what "no node"
> might mean if I were to read it.
> 
> There is a reason why we set ret = EFI_OUT_OF_RESOURCES?
> 
> The caller should know what this means.

There's a fine balance to be struck here. An error message should be
grep'd through in the code, for debug messages. With CONFIG_LOG we're
already getting file, line and function.

-- 
Tom
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