On Thu, Feb 26, 2015 at 09:55:03AM +0100, Rasmus Villemoes wrote:
> Commit fab4c256a58b ("PCI/AER: Add a TLP header print helper")
> introduced the helper function __print_tlp_header, but contrary to the
> intention, the behaviour did change: Since we're taking the address of
> the parameter t, the first 4 or 8 bytes printed will be the value of
> the pointer t itself, and the remaining 12 or 8 bytes will be
> who-knows-what (something from the stack).
>
> We want to show the values of the four members of the struct
> aer_header_log_regs; that can be done without ugly and error-prone
> casts. On little-endian this should produce the same output as
> originally intended, and since no-one has complained about getting
> garbage output so far, I think big-endian should be ok too.
>
> Fixes: fab4c256a58b ("PCI/AER: Add a TLP header print helper")
> Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Applied with Borislav's ack to for-linus for v4.0, thanks! Also added
stable tag.
> ---
> v2: Just print ->dwX as-is.
>
> drivers/pci/pcie/aer/aerdrv_errprint.c | 12 ++----------
> 1 file changed, 2 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
> index c6849d9e86ce..167fe411ce2e 100644
> --- a/drivers/pci/pcie/aer/aerdrv_errprint.c
> +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
> @@ -132,16 +132,8 @@ static const char *aer_agent_string[] = {
> static void __print_tlp_header(struct pci_dev *dev,
> struct aer_header_log_regs *t)
> {
> - unsigned char *tlp = (unsigned char *)&t;
> -
> - dev_err(&dev->dev, " TLP Header:"
> - " %02x%02x%02x%02x %02x%02x%02x%02x"
> - " %02x%02x%02x%02x %02x%02x%02x%02x\n",
> - *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
> - *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
> - *(tlp + 11), *(tlp + 10), *(tlp + 9),
> - *(tlp + 8), *(tlp + 15), *(tlp + 14),
> - *(tlp + 13), *(tlp + 12));
> + dev_err(&dev->dev, " TLP Header: %08x %08x %08x %08x\n",
> + t->dw0, t->dw1, t->dw2, t->dw3);
> }
>
> static void __aer_print_error(struct pci_dev *dev,
> --
> 2.1.3
>
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