Re: [PATCH 1/1] PCI: fix on-stack pci_device_id's

[Bjorn Helgaas]

On Mon, Sep 10, 2012 at 4:55 PM, Fengguang Wu <fengguang.wu@xxxxxxxxx> wrote:
> On Mon, Sep 10, 2012 at 02:44:32PM -0600, Bjorn Helgaas wrote:
>> On Mon, Sep 10, 2012 at 1:36 PM, Jiri Slaby <jslaby@xxxxxxx> wrote:
>> > Commit "PCI: Use pci_device_id on stack for pci_get_subsys/class() to
>> > avoid kmalloc" changed heap allocations to on-stack variables, but it
>> > did not add initialization of other than set members. This causes
>> > random failures during bootup wherever pci device is needed to be
>> > found. Hence the boot just hangs or panics.
>> >
>> > This patches fixes it by setting the content of pci_device_id directly
>> > in the initializer.
>>
>> Nice!  I fixed this already by adding a memset(), but I like your way
>> better.  I knew we could initialize members of a structure on the
>> stack, but I didn't know C guaranteed that uninitialized members would
>> be implicitly initialized also.  But apparently it does:
>>
>> http://stackoverflow.com/questions/10828294/c-and-c-partial-initialization-of-automatic-structure
>
> Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
>
> For the record, I proposed the same initializer-style fix in the very
> beginning that you didn't realize its beauty until now ;-)

Yep, I credited you :)  Sorry I didn't look closely enough to begin with.
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