Re: [PATCH 2/2] NFC: nxp-nci: Don't issue a zero length i2c_master_read()

[Michael Walle]

Am 2022-06-28 07:03, schrieb Jakub Kicinski:
> On Sun, 26 Jun 2022 21:42:43 +0200 Michael Walle wrote:
> > There are packets which doesn't have a payload. In that case, the 
> > second
> > i2c_master_read() will have a zero length. But because the NFC
> > controller doesn't have any data left, it will NACK the I2C read and
> > -ENXIO will be returned. In case there is no payload, just skip the
> > second i2c master read.
>
> Whoa, are you using this code or just found the problem thru code
> inspection? NFC is notorious for having no known users.

Ha! Well, I *try* to use it with a PN7160. No luck so far, we'll see.
At least the communication with the chip works now. I was also kinda
tricked by the Supported status ;)

-michael