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author | Alex Dubov <oakad@yahoo.com> | 2008-07-25 19:45:02 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:04 -0700 |
commit | f1d82698029b92a88f5500b99f66514b6dee2bc3 (patch) | |
tree | eaedb613a05e1471fbeca212b3b1229ab252627d /drivers/memstick/host/tifm_ms.c | |
parent | 17017d8d2c005734d7088d8281ce2daab8fcb097 (diff) | |
download | linux-stable-f1d82698029b92a88f5500b99f66514b6dee2bc3.tar.gz linux-stable-f1d82698029b92a88f5500b99f66514b6dee2bc3.tar.bz2 linux-stable-f1d82698029b92a88f5500b99f66514b6dee2bc3.zip |
memstick: use fully asynchronous request processing
Instead of using a separate thread to pump requests from block layer queue
to memstick, do so inline, utilizing the callback design of the memstick.
[akpm@linux-foundation.org: fix warnings]
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/memstick/host/tifm_ms.c')
-rw-r--r-- | drivers/memstick/host/tifm_ms.c | 49 |
1 files changed, 29 insertions, 20 deletions
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c index 14458764588c..d32d6ad8f3fc 100644 --- a/drivers/memstick/host/tifm_ms.c +++ b/drivers/memstick/host/tifm_ms.c @@ -71,6 +71,7 @@ struct tifm_ms { struct tifm_dev *dev; struct timer_list timer; struct memstick_request *req; + struct tasklet_struct notify; unsigned int mode_mask; unsigned int block_pos; unsigned long timeout_jiffies; @@ -455,40 +456,45 @@ static void tifm_ms_card_event(struct tifm_dev *sock) return; } -static void tifm_ms_request(struct memstick_host *msh) +static void tifm_ms_req_tasklet(unsigned long data) { + struct memstick_host *msh = (struct memstick_host *)data; struct tifm_ms *host = memstick_priv(msh); struct tifm_dev *sock = host->dev; unsigned long flags; int rc; spin_lock_irqsave(&sock->lock, flags); - if (host->req) { - printk(KERN_ERR "%s : unfinished request detected\n", - sock->dev.bus_id); - spin_unlock_irqrestore(&sock->lock, flags); - tifm_eject(host->dev); - return; - } + if (!host->req) { + if (host->eject) { + do { + rc = memstick_next_req(msh, &host->req); + if (!rc) + host->req->error = -ETIME; + } while (!rc); + spin_unlock_irqrestore(&sock->lock, flags); + return; + } - if (host->eject) { do { rc = memstick_next_req(msh, &host->req); - if (!rc) - host->req->error = -ETIME; - } while (!rc); - spin_unlock_irqrestore(&sock->lock, flags); - return; + } while (!rc && tifm_ms_issue_cmd(host)); } - - do { - rc = memstick_next_req(msh, &host->req); - } while (!rc && tifm_ms_issue_cmd(host)); - spin_unlock_irqrestore(&sock->lock, flags); +} + +static void tifm_ms_dummy_submit(struct memstick_host *msh) +{ return; } +static void tifm_ms_submit_req(struct memstick_host *msh) +{ + struct tifm_ms *host = memstick_priv(msh); + + tasklet_schedule(&host->notify); +} + static int tifm_ms_set_param(struct memstick_host *msh, enum memstick_param param, int value) @@ -569,8 +575,9 @@ static int tifm_ms_probe(struct tifm_dev *sock) host->timeout_jiffies = msecs_to_jiffies(1000); setup_timer(&host->timer, tifm_ms_abort, (unsigned long)host); + tasklet_init(&host->notify, tifm_ms_req_tasklet, (unsigned long)msh); - msh->request = tifm_ms_request; + msh->request = tifm_ms_submit_req; msh->set_param = tifm_ms_set_param; sock->card_event = tifm_ms_card_event; sock->data_event = tifm_ms_data_event; @@ -592,6 +599,8 @@ static void tifm_ms_remove(struct tifm_dev *sock) int rc = 0; unsigned long flags; + msh->request = tifm_ms_dummy_submit; + tasklet_kill(&host->notify); spin_lock_irqsave(&sock->lock, flags); host->eject = 1; if (host->req) { |