Oliver Hartkopp c7cd606f60 can: Fix data length code handling in rx path ... A valid CAN dataframe can have a data length code (DLC) of 0 .. 8 data bytes. When reading the CAN controllers register the 4-bit value may contain values from 0 .. 15 which may exceed the reserved space in the socket buffer! The ISO 11898-1 Chapter 8.4.2.3 (DLC field) says that register values > 8 should be reduced to 8 without any error reporting or frame drop. This patch introduces a new helper macro to cast a given 4-bit data length code (dlc) to __u8 and ensure the DLC value to be max. 8 bytes. The different handlings in the rx path of the CAN netdevice drivers are fixed. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-12-13 19:47:42 -08:00
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Kconfig	net/can/mscan: improve build	2009-11-17 03:57:34 -08:00
Makefile	net/can/mscan: improve build	2009-11-17 03:57:34 -08:00
mpc5xxx_can.c	net/can/mscan: improve build	2009-11-17 03:57:34 -08:00
mscan.c	can: Fix data length code handling in rx path	2009-12-13 19:47:42 -08:00
mscan.h	net/can/mscan: replace hardcoded values with defines	2009-11-17 03:54:04 -08:00