From: Stefan Richter Date: Thu, 24 Jan 2008 00:53:19 +0000 (+0100) Subject: firewire: fw-sbp2: use device generation, not card generation X-Git-Tag: v2.6.25-rc1~1133^2~6 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a8a1bcd15dfb9f177f3605fe6b9ba2bef2bf55a;p=linux-2.6 firewire: fw-sbp2: use device generation, not card generation There was a small window where a login or reconnect job could use an already updated card generation with an outdated node ID. We have to use the fw_device.generation here, not the fw_card.generation, because the generation must never be newer than the node ID when we emit a transaction. This cannot be guaranteed with fw_card.generation. Furthermore, the target's and initiator's node IDs can be obtained from fw_device and fw_card. Dereferencing their underlying topology objects is not necessary. Signed-off-by: Stefan Richter Verified in concert with subsequent memory barriers patch to fix 'giving up on config rom' issues on multiple system and drive combinations that were previously affected. Signed-off-by: Jarod Wilson --- diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index d2fbfc6f6d..d406c34fd3 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -661,9 +661,9 @@ static void sbp2_login(struct work_struct *work) struct sbp2_login_response response; int generation, node_id, local_node_id; - generation = device->card->generation; - node_id = device->node->node_id; - local_node_id = device->card->local_node->node_id; + generation = device->generation; + node_id = device->node_id; + local_node_id = device->card->node_id; if (sbp2_send_management_orb(lu, node_id, generation, SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { @@ -911,9 +911,9 @@ static void sbp2_reconnect(struct work_struct *work) struct fw_device *device = fw_device(unit->device.parent); int generation, node_id, local_node_id; - generation = device->card->generation; - node_id = device->node->node_id; - local_node_id = device->card->local_node->node_id; + generation = device->generation; + node_id = device->node_id; + local_node_id = device->card->node_id; if (sbp2_send_management_orb(lu, node_id, generation, SBP2_RECONNECT_REQUEST,