diff options
| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-08-04 18:38:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-08-09 14:27:31 -0700 |
| commit | 76525808fce1f652a6d8472db5a84d28b0951c90 (patch) | |
| tree | 0ea0c5ac6d0f797beddae8f001d03c572790c6d6 /drivers | |
| parent | 33aff30ab29fa997b8d146d2416e32fd9600b217 (diff) | |
firewire: fw-sbp2: set correct maximum payload (fixes CardBus adapters)
As far as I know, all CardBus FireWire 400 adapters have a maximum
payload of 1024 bytes which is less than the speed-dependent limit of
2048 bytes. Fw-sbp2 has to take the host adapter's limit into account.
This apparently fixes Juju's incompatibility with my CardBus cards, a
NEC based card and a VIA based card.
Backport of commit 25659f7183376c6b37661da6141d5eaa21479061.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firewire/fw-sbp2.c | 5 | ||||
| -rw-r--r-- | drivers/firewire/fw-transaction.h | 2 |
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index a98d3915e26f..a68f7de2c436 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -985,6 +985,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) struct fw_unit *unit = sd->unit; struct fw_device *device = fw_device(unit->device.parent); struct sbp2_command_orb *orb; + unsigned max_payload; /* * Bidirectional commands are not yet implemented, and unknown @@ -1023,8 +1024,10 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) * specifies the max payload size as 2 ^ (max_payload + 2), so * if we set this to max_speed + 7, we get the right value. */ + max_payload = device->node->max_speed + 7; + max_payload = min(max_payload, device->card->max_receive - 1); orb->request.misc = - COMMAND_ORB_MAX_PAYLOAD(device->node->max_speed + 7) | + COMMAND_ORB_MAX_PAYLOAD(max_payload) | COMMAND_ORB_SPEED(device->node->max_speed) | COMMAND_ORB_NOTIFY; diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h index acdc3be38c61..b6b42fa3fff0 100644 --- a/drivers/firewire/fw-transaction.h +++ b/drivers/firewire/fw-transaction.h @@ -228,7 +228,7 @@ struct fw_card { unsigned long reset_jiffies; unsigned long long guid; - int max_receive; + unsigned max_receive; int link_speed; int config_rom_generation; |