Re: [PATCH 07/12] pci: epf-test: Add debug and error messages

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Feb 15, 2023 at 12:21:50PM +0900, Damien Le Moal wrote:
> Make the pci-epf-test driver more verbose with dynamic debug messages
> using dev_dbg(). Also add some dev_err() error messages to help
> troubleshoot issues.
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
> ---
>  drivers/pci/endpoint/functions/pci-epf-test.c | 69 +++++++++++++++----
>  1 file changed, 56 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
> index f630393e8208..9b791f4a7ffb 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-test.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-test.c
> @@ -330,6 +330,10 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test, bool use_dma)
>  	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
>  	volatile struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
>  
> +	dev_dbg(&epf->dev,
> +		"COPY src addr 0x%llx, dst addr 0x%llx, %u B\n",
> +		reg->src_addr, reg->dst_addr, reg->size);

Again, no, please just use ftrace.

thanks,

greg k-h