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  1. 14 12月, 2009 1 次提交
    • O
      can: Fix data length code handling in rx path · c7cd606f
      由 Oliver Hartkopp 提交于 
      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: NOliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c7cd606f
  3. 12 12月, 2009 1 次提交
  5. 04 12月, 2009 1 次提交
  7. 19 11月, 2009 1 次提交
  9. 18 11月, 2009 1 次提交
  11. 17 11月, 2009 11 次提交
  13. 14 11月, 2009 3 次提交
  15. 08 11月, 2009 3 次提交
  17. 07 11月, 2009 1 次提交
  19. 27 10月, 2009 1 次提交
  21. 20 10月, 2009 1 次提交
    • W
      can: provide library functions for skb allocation · 7b6856a0
      由 Wolfgang Grandegger 提交于 
      This patch makes the private functions alloc_can_skb() and
alloc_can_err_skb() of the at91_can driver public and adapts all
drivers to use these. While making the patch I realized, that
the skb's are *not* setup consistently. It's now done as shown
below:

  skb->protocol = htons(ETH_P_CAN);
  skb->pkt_type = PACKET_BROADCAST;
  skb->ip_summed = CHECKSUM_UNNECESSARY;
  *cf = (struct can_frame *)skb_put(skb, sizeof(struct can_frame));
  memset(*cf, 0, sizeof(struct can_frame));

The frame is zeroed out to avoid uninitialized data to be passed to
user space. Some drivers or library code did not set "pkt_type" or
"ip_summed". Also,  "__constant_htons()" should not be used for
runtime invocations, as pointed out by David Miller.
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7b6856a0
  23. 15 10月, 2009 1 次提交
  25. 13 10月, 2009 1 次提交
  27. 08 10月, 2009 1 次提交
  29. 26 9月, 2009 1 次提交
  31. 25 9月, 2009 1 次提交
  33. 23 9月, 2009 1 次提交
  35. 22 9月, 2009 1 次提交
  37. 15 9月, 2009 1 次提交
  39. 04 9月, 2009 3 次提交
    • W
      can: sja1000: legacy SJA1000 ISA bus driver · 2a6ba39a
      由 Wolfgang Grandegger 提交于 
      This patch adds support for legacy SJA1000 CAN controllers on the ISA
or PC-104 bus. The I/O port or memory address and the IRQ number must
be specified via module parameters:

  insmod sja1000_isa.ko port=0x310,0x380 irq=7,11

for ISA devices using I/O ports or:

  insmod sja1000_isa.ko mem=0xd1000,0xd1000 irq=7,11

for memory mapped ISA devices.

Indirect access via address and data port is supported as well:

  insmod sja1000_isa.ko port=0x310,0x380 indirect=1 irq=7,11

Here is a full list of the supported module parameters:

  port:I/O port number (array of ulong)
  mem:I/O memory address (array of ulong)
  indirect:Indirect access via address and data port (array of byte)
  irq:IRQ number (array of int)
  clk:External oscillator clock frequency (default=16000000 [16 MHz])
      (array of int)
  cdr:Clock divider register (default=0x48 [CDR_CBP | CDR_CLK_OFF])
      (array of byte)
  ocr:Output clock register (default=0x18 [OCR_TX0_PUSHPULL])
      (array of byte)

Note: for clk, cdr, ocr, the first argument re-defines the default
for all other devices, e.g.:

 insmod sja1000_isa.ko mem=0xd1000,0xd1000 irq=7,11 clk=24000000

is equivalent to

 insmod sja1000_isa.ko mem=0xd1000,0xd1000 irq=7,11 \
                       clk=24000000,24000000
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Tested-by: NOliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      2a6ba39a
    • W
      can: sja1000: fix network statistics update · 8935f57e
      由 Wolfgang Grandegger 提交于 
      The member "tx_bytes" of "struct net_device_stats" should be
incremented when the interrupt is done and an "arbitration
lost error" is a TX error and the statistics should be updated
accordingly.
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      8935f57e
    • W
      can: add can_free_echo_skb() for upcoming drivers · 39e3ab6f
      由 Wolfgang Grandegger 提交于 
      This patch adds the function can_free_echo_skb to the CAN
device interface to allow upcoming drivers to release echo
skb's in case of error.
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      39e3ab6f
  41. 03 9月, 2009 1 次提交
  43. 01 9月, 2009 2 次提交
  45. 14 8月, 2009 1 次提交