Re: [PATCH] NFC: nxp-nci: Fix NULL pointer dereference after I2C communication error

[David Miller]

From: Stephan Gerhold <stephan@xxxxxxxxxxx>
Date: Sun, 10 Nov 2019 17:19:15 +0100

> I2C communication errors (-EREMOTEIO) during the IRQ handler of nxp-nci
> result in a NULL pointer dereference at the moment:
 ...
> Change the code to call only nxp_nci_fw_recv_frame() in case of an error.
> Make sure to log it so it is obvious that a communication error occurred.
> The error above then becomes:
> 
>     nxp-nci_i2c i2c-NXP1001:00: NFC: Read failed with error -121
>     nci: __nci_request: wait_for_completion_interruptible_timeout failed 0
>     nxp-nci_i2c i2c-NXP1001:00: NFC: Read failed with error -121
> 
> Fixes: 6be88670fc59 ("NFC: nxp-nci_i2c: Add I2C support to NXP NCI driver")
> Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>

Applied and queued up for -stable.