aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/firewire/core-device.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/firewire/core-device.c')
-rw-r--r--drivers/firewire/core-device.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 8ba7f7928f1..f3b890da1e8 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;