From: Vic Yang <victoryang@xxxxxxxxxx> For SPI, we can get up to 32 additional bytes for response preamble. The current overhead (2 bytes) may cause problems when we try to receive a big response. Update it to 32 bytes. Without this fix we could see a kernel BUG when we receive a big response from the Chrome EC when is connected via SPI. Signed-off-by: Vic Yang <victoryang@xxxxxxxxxx> Tested-by: Enric Balletbo i Serra <enric.balletbo.collabora.com> --- This patch is a FIX, and I think that would be interesting see it merged in this release cycle. This should go through the MFD tree and can be picked independently of the other patches. Lee Jones I think this is for you. include/linux/mfd/cros_ec.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index b3e812f..3b16c90 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -35,10 +35,11 @@ * Max bus-specific overhead incurred by request/responses. * I2C requires 1 additional byte for requests. * I2C requires 2 additional bytes for responses. + * SPI requires up to 32 additional bytes for responses. * */ #define EC_PROTO_VERSION_UNKNOWN 0 #define EC_MAX_REQUEST_OVERHEAD 1 -#define EC_MAX_RESPONSE_OVERHEAD 2 +#define EC_MAX_RESPONSE_OVERHEAD 32 /* * Command interface between EC and AP, for LPC, I2C and SPI interfaces. -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
