Date: Wed, 11 Apr 2012 17:39:59 +0200 From: Clemens Ladisch Subject: firewire: core: fw_device_refresh(): clean up error handling In fw_device_init() and fw_device_refresh(), if a call to read_cofig_rom() fails, the operation is retried a few times, with these retries being controlled by the MAX_RETRIES and RETRY_DELAY symbols. fw_device_refresh() also reads part of the config rom by calling reread_config_rom(). Any errors from this call resulted in retries with MAX_RETRIES/2 and RETRY_DELAY/2. There is no reason to require that a device that has initiated a bus reset must react faster to read requests than a device that has just been plugged in. Furthermore, if the config rom has changed, any errors from the following read_config_rom() call are then handled with the normal retry count and delay. Remove this inconsistency by always using the normal retry count and delay. (This also makes the two error handlers identical and allows merging them.) Signed-off-by: Clemens Ladisch Signed-off-by: Stefan Richter --- drivers/firewire/core-device.c | 33 ++++++++++++--------------------- 1 file changed, 12 insertions(+), 21 deletions(-) --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -1116,16 +1116,8 @@ static void fw_device_refresh(struct wor bool changed; ret = reread_config_rom(device, device->generation, &changed); - if (ret != RCODE_COMPLETE) { - if (device->config_rom_retries < MAX_RETRIES / 2 && - atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { - device->config_rom_retries++; - fw_schedule_device_work(device, RETRY_DELAY / 2); - - return; - } - goto give_up; - } + if (ret != RCODE_COMPLETE) + goto failed_config_rom; if (!changed) { if (atomic_cmpxchg(&device->state, @@ -1145,16 +1137,8 @@ static void fw_device_refresh(struct wor device_for_each_child(&device->device, NULL, shutdown_unit); ret = read_config_rom(device, device->generation); - if (ret != RCODE_COMPLETE) { - if (device->config_rom_retries < MAX_RETRIES && - atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { - device->config_rom_retries++; - fw_schedule_device_work(device, RETRY_DELAY); - - return; - } - goto give_up; - } + if (ret != RCODE_COMPLETE) + goto failed_config_rom; fw_device_cdev_update(device); create_units(device); @@ -1171,7 +1155,14 @@ static void fw_device_refresh(struct wor device->config_rom_retries = 0; goto out; - give_up: + failed_config_rom: + if (device->config_rom_retries < MAX_RETRIES && + atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { + device->config_rom_retries++; + fw_schedule_device_work(device, RETRY_DELAY); + return; + } + fw_notice(card, "giving up on refresh of device %s: %s\n", dev_name(&device->device), fw_rcode_string(ret)); gone: