Messages in this thread Patch in this message | | | From | Laurent Vivier <> | Subject | [PATCH 1/2] firewire: firewire is a big-endian bus | Date | Tue, 21 Apr 2015 02:36:15 +0200 |
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So, dump config_rom data as big-endian values.
The value given by /sys/bus/firewire/devices/fw0 were correctly given on a big-endian host (like powermac) not on a little-endian host (like PC), for instance:
00000000 87 a4 04 04 34 39 33 31 22 a2 00 f0 33 22 11 00 |....4931"...3"..| 00000010 66 66 66 33 0b dd 05 00 c0 83 00 0c 1e 0d d0 03 |fff3............| 00000020 03 00 00 81 01 00 00 17 08 00 00 81 b7 4c 06 00 |.............L..| 00000030 00 00 00 00 00 00 00 00 75 6e 69 4c 69 46 20 78 |........uniLiF x| 00000040 69 77 65 72 00 00 65 72 1c ff 03 00 00 00 00 00 |iwer..er........| 00000050 00 00 00 00 75 6a 75 4a |....ujuJ| 00000058
instead of:
00000000 04 04 a4 87 31 33 39 34 f0 00 a2 22 00 11 22 33 |....1394...".."3| 00000010 33 66 66 66 00 05 dd 0b 0c 00 83 c0 03 d0 0d 1e |3fff............| 00000020 81 00 00 03 17 00 00 01 81 00 00 08 00 06 4c b7 |..............L.| 00000030 00 00 00 00 00 00 00 00 4c 69 6e 75 78 20 46 69 |........Linux Fi| 00000040 72 65 77 69 72 65 00 00 00 03 ff 1c 00 00 00 00 |rewire..........| 00000050 00 00 00 00 4a 75 6a 75 |....Juju| 00000058
This patch corrects this.
Signed-off-by: Laurent Vivier <laurent@vivier.eu> --- drivers/firewire/core-device.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index f9e3aee..5245567 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -399,14 +399,14 @@ static ssize_t config_rom_show(struct device *dev, struct device_attribute *attr, char *buf) { struct fw_device *device = fw_device(dev); - size_t length; + size_t i; down_read(&fw_device_rwsem); - length = device->config_rom_length * 4; - memcpy(buf, device->config_rom, length); + for (i = 0; i < device->config_rom_length; i++) + ((u32 *)buf)[i] = be32_to_cpu(device->config_rom[i]); up_read(&fw_device_rwsem); - return length; + return i * 4; } static ssize_t guid_show(struct device *dev, -- 1.9.1
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