Merge tag 'linux-can-fixes-for-3.15-20140424' of git://gitorious.org/…

…linux-can/linux-can

Marc Kleine-Budde says:

====================
this is a pull request for net/master, for the v3.15 release cycle, consisting
of 26 patches.

Thomas Gleixner contributes 21 patches for the c_can driver, which address
several shortcomings in the driver like hardware initialisation, concurrency,
message ordering and poor performance. Two patches Oliver Hartkopp, one adds a
missing lock to the sja1000_isa driver, the other one fixes the return value in
the generic bit time configuration function. And finally a patch by Alexander
Stein, that fixes the slcan driver to use the correct spinlock variant.

To make it 26 patches, Wolfgang Grandegger patch for the c_can_pci
driver, which enables the bus master only for MSI and a patch by
Wolfram Sang, which converts the 'instance' in the c_can driver to the
proper type.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/can/c_can/Kconfig

@@ -14,6 +14,13 @@ config CAN_C_CAN_PLATFORM
 	  SPEAr1310 and SPEAr320 evaluation boards & TI (www.ti.com)
 	  boards like am335x, dm814x, dm813x and dm811x.
 
+config CAN_C_CAN_STRICT_FRAME_ORDERING
+	bool "Force a strict RX CAN frame order (may cause frame loss)"
+	---help---
+	  The RX split buffer prevents packet reordering but can cause packet
+	  loss. Only enable this option when you accept to lose CAN frames
+	  in favour of getting the received CAN frames in the correct order.
+
 config CAN_C_CAN_PCI
 	tristate "Generic PCI Bus based C_CAN/D_CAN driver"
 	depends on PCI