diff options
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/core-device.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index 95a471401892..9f661e069318 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -455,15 +455,20 @@ static struct device_attribute fw_device_attributes[] = { static int read_rom(struct fw_device *device, int generation, int index, u32 *data) { - int rcode; + u64 offset = (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4; + int i, rcode; /* device->node_id, accessed below, must not be older than generation */ smp_rmb(); - rcode = fw_run_transaction(device->card, TCODE_READ_QUADLET_REQUEST, - device->node_id, generation, device->max_speed, - (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4, - data, 4); + for (i = 10; i < 100; i += 10) { + rcode = fw_run_transaction(device->card, + TCODE_READ_QUADLET_REQUEST, device->node_id, + generation, device->max_speed, offset, data, 4); + if (rcode != RCODE_BUSY) + break; + msleep(i); + } be32_to_cpus(data); return rcode; |