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firewire: sbp2: replace some spin_lock_irqsave by spin_lock_irq 

Users of card->lock        Calling context
------------------------------------------------------------------------
sbp2_status_write          AR-req handler, tasklet
complete_transaction       AR-resp or AT-req handler, tasklet
sbp2_send_orb              among else scsi host .queuecommand, which may
                           be called in some sort of atomic context
sbp2_cancel_orbs           sbp2_send_management_orb/
                               sbp2_{login,reconnect,remove},
                               worklet or process
                           sbp2_scsi_abort, scsi eh thread
sbp2_allow_block           sbp2_login, worklet
sbp2_conditionally_block   among else complete_command_orb, tasklet
sbp2_conditionally_unblock sbp2_{login,reconnect}, worklet
sbp2_unblock               sbp2_{login,remove}, worklet or process

Drop the IRQ flags saving from sbp2_cancel_orbs,
sbp2_conditionally_unblock, and sbp2_unblock.
It was already omitted in sbp2_allow_block.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2014-03-03 23:23:22 +01:00
parent 0765cbd3be
commit 8e045a31e7
1 changed files with 6 additions and 9 deletions
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15
drivers/firewire/sbp2.c
View File

@ -524,13 +524,12 @@ static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
struct fw_device *device = target_parent_device(lu->tgt);
struct sbp2_orb *orb, *next;
struct list_head list;
unsigned long flags;
int retval = -ENOENT;
INIT_LIST_HEAD(&list);
spin_lock_irqsave(&device->card->lock, flags);
spin_lock_irq(&device->card->lock);
list_splice_init(&lu->orb_list, &list);
spin_unlock_irqrestore(&device->card->lock, flags);
spin_unlock_irq(&device->card->lock);
list_for_each_entry_safe(orb, next, &list, link) {
retval = 0;
@ -737,15 +736,14 @@ static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
struct fw_card *card = target_parent_device(tgt)->card;
struct Scsi_Host *shost =
container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
unsigned long flags;
bool unblock = false;
spin_lock_irqsave(&card->lock, flags);
spin_lock_irq(&card->lock);
if (lu->blocked && lu->generation == card->generation) {
lu->blocked = false;
unblock = --tgt->blocked == 0;
}
spin_unlock_irqrestore(&card->lock, flags);
spin_unlock_irq(&card->lock);
if (unblock)
scsi_unblock_requests(shost);
@ -762,11 +760,10 @@ static void sbp2_unblock(struct sbp2_target *tgt)
struct fw_card *card = target_parent_device(tgt)->card;
struct Scsi_Host *shost =
container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
unsigned long flags;
spin_lock_irqsave(&card->lock, flags);
spin_lock_irq(&card->lock);
++tgt->dont_block;
spin_unlock_irqrestore(&card->lock, flags);
spin_unlock_irq(&card->lock);
scsi_unblock_requests(shost);
}