lkml.org 
[lkml]   [2022]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/2] spi: core: Display return code when failing to transfer message
Hello,

On Wed, May 25, 2022 at 11:58:52AM -0500, Eddie James wrote:
> All the other calls to the controller driver display the error
> return code. The return code is helpful to understand what went
> wrong, so include it when failing to transfer one message.
>
> Signed-off-by: Eddie James <eajames@linux.ibm.com>
> ---
> drivers/spi/spi.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 481edea77c62..ea09d1b42bf6 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -1654,7 +1654,8 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
> ret = ctlr->transfer_one_message(ctlr, msg);
> if (ret) {
> dev_err(&ctlr->dev,
> - "failed to transfer one message from queue\n");
> + "failed to transfer one message from queue: %d\n",
> + ret);

(I know it's too late, just stumbled over this commit in mainline by
chance. So maybe just a suggestion for the next similar change...)

A tad nicer would be to use %pe instead of %d that results in

mydev mybus: failed to transfer one message from queue: -EIO

instead of

mydev mybus: failed to transfer one message from queue: -5

and so is more descriptive. (Note you need ERR_PTR(ret) for %pe.)

Best regards
Uwe

--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2022-06-02 10:24    [W:0.088 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site