Em Sun, 19 Jan 2014 22:48:36 +0100
Frank Schäfer <fschaefer....@googlemail.com> escreveu:
> Commit e63b009d6e "" changed the error codes i2c ACK errors from -ENODEV to
> -ENXIO.
> But it also introduced a line that maps -ENXIO back to -ENODEV in case of
> empty i2c
> messages, which makes no sense, because
> 1.) an ACK error is an ACK error no matter what the i2c message content is
> 2.) -ENXIO is perfectly suited for probing, too
I don't agree with this patch. 0-byte messages are only usin during device
probe.
> 3.) we are loosing the ability to distinguish USB device disconnects
Huh?
>
> Signed-off-by: Frank Schäfer <fschaefer....@googlemail.com>
> ---
> drivers/media/usb/em28xx/em28xx-i2c.c | 1 -
> 1 Datei geändert, 1 Zeile entfernt(-)
>
> diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c
> b/drivers/media/usb/em28xx/em28xx-i2c.c
> index ba6433c..a26d7d4 100644
> --- a/drivers/media/usb/em28xx/em28xx-i2c.c
> +++ b/drivers/media/usb/em28xx/em28xx-i2c.c
> @@ -539,7 +539,6 @@ static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap,
> if (rc == -ENXIO) {
> if (i2c_debug > 1)
> printk(KERN_CONT " no
> device\n");
> - rc = -ENODEV;
> } else {
> if (i2c_debug > 1)
> printk(KERN_CONT " ERROR:
> %i\n", rc);
--
Cheers,
Mauro
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