Date: Sun, 4 Feb 2007 20:57:38 +0100 (CET) From: Stefan Richter Subject: ieee1394: sbp2: move some memory allocations into non-atomic context When the command ORB pool is created, the ORB list won't be accessed concurrently. Therefore we don't have to take the spinlock there. Signed-off-by: Stefan Richter --- drivers/ieee1394/sbp2.c | 20 +++++--------------- 1 file changed, 5 insertions(+), 15 deletions(-) Index: foo/drivers/ieee1394/sbp2.c =================================================================== --- foo.orig/drivers/ieee1394/sbp2.c +++ foo/drivers/ieee1394/sbp2.c @@ -469,19 +469,13 @@ static void sbp2util_write_doorbell(stru static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) { struct sbp2_fwhost_info *hi = lu->hi; - int i; - unsigned long flags, orbs; struct sbp2_command_info *cmd; + int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; - orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; - - spin_lock_irqsave(&lu->cmd_orb_lock, flags); for (i = 0; i < orbs; i++) { - cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); - if (!cmd) { - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (!cmd) return -ENOMEM; - } cmd->command_orb_dma = dma_map_single(hi->host->device.parent, &cmd->command_orb, sizeof(struct sbp2_command_orb), @@ -493,7 +487,6 @@ static int sbp2util_create_command_orb_p INIT_LIST_HEAD(&cmd->list); list_add_tail(&cmd->list, &lu->cmd_orb_completed); } - spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); return 0; } @@ -870,11 +863,8 @@ static int sbp2_start_device(struct sbp2 if (!lu->login_orb) goto alloc_fail; - if (sbp2util_create_command_orb_pool(lu)) { - SBP2_ERR("sbp2util_create_command_orb_pool failed!"); - sbp2_remove_device(lu); - return -ENOMEM; - } + if (sbp2util_create_command_orb_pool(lu)) + goto alloc_fail; /* Wait a second before trying to log in. Previously logged in * initiators need a chance to reconnect. */