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authorStephen M. Cameron <scameron@beardog.cce.hp.com>2012-05-01 20:43:01 +0400
committerJames Bottomley <JBottomley@Parallels.com>2012-05-10 12:15:46 +0400
commit1d94f94d89848762306b4a8bd5e658c11828ab12 (patch)
treeedcbf9e84b73b6853ed8f0790a1ebc0e504f81fe /drivers/scsi/hpsa.c
parent6cba3f1972de14421ef4cf4b46a15cc5d604e791 (diff)
downloadlinux-1d94f94d89848762306b4a8bd5e658c11828ab12.tar.xz
[SCSI] hpsa: factor out tail calls to next_command() in process_(non)indexed_cmd()
This is in order to smooth the way for upcoming changes to allow use of multiple reply queues for command completions. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Matt Gates <matthew.gates@hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/hpsa.c')
-rw-r--r--drivers/scsi/hpsa.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 87f8a1b8d2ea..bf5ed873a33e 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3379,22 +3379,21 @@ static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
}
/* process completion of an indexed ("direct lookup") command */
-static inline u32 process_indexed_cmd(struct ctlr_info *h,
+static inline void process_indexed_cmd(struct ctlr_info *h,
u32 raw_tag)
{
u32 tag_index;
struct CommandList *c;
tag_index = hpsa_tag_to_index(raw_tag);
- if (bad_tag(h, tag_index, raw_tag))
- return next_command(h);
- c = h->cmd_pool + tag_index;
- finish_cmd(c);
- return next_command(h);
+ if (!bad_tag(h, tag_index, raw_tag)) {
+ c = h->cmd_pool + tag_index;
+ finish_cmd(c);
+ }
}
/* process completion of a non-indexed command */
-static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
+static inline void process_nonindexed_cmd(struct ctlr_info *h,
u32 raw_tag)
{
u32 tag;
@@ -3404,11 +3403,10 @@ static inline u32 process_nonindexed_cmd(struct ctlr_info *h,
list_for_each_entry(c, &h->cmpQ, list) {
if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) {
finish_cmd(c);
- return next_command(h);
+ return;
}
}
bad_tag(h, h->nr_cmds + 1, raw_tag);
- return next_command(h);
}
/* Some controllers, like p400, will give us one interrupt
@@ -3483,10 +3481,11 @@ static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id)
while (interrupt_pending(h)) {
raw_tag = get_next_completion(h);
while (raw_tag != FIFO_EMPTY) {
- if (hpsa_tag_contains_index(raw_tag))
- raw_tag = process_indexed_cmd(h, raw_tag);
+ if (likely(hpsa_tag_contains_index(raw_tag)))
+ process_indexed_cmd(h, raw_tag);
else
- raw_tag = process_nonindexed_cmd(h, raw_tag);
+ process_nonindexed_cmd(h, raw_tag);
+ raw_tag = next_command(h);
}
}
spin_unlock_irqrestore(&h->lock, flags);
@@ -3503,10 +3502,11 @@ static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id)
h->last_intr_timestamp = get_jiffies_64();
raw_tag = get_next_completion(h);
while (raw_tag != FIFO_EMPTY) {
- if (hpsa_tag_contains_index(raw_tag))
- raw_tag = process_indexed_cmd(h, raw_tag);
+ if (likely(hpsa_tag_contains_index(raw_tag)))
+ process_indexed_cmd(h, raw_tag);
else
- raw_tag = process_nonindexed_cmd(h, raw_tag);
+ process_nonindexed_cmd(h, raw_tag);
+ raw_tag = next_command(h);
}
spin_unlock_irqrestore(&h->lock, flags);
return IRQ_HANDLED;