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author | Jens Axboe <jaxboe@fusionio.com> | 2010-10-19 09:13:04 +0200 |
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committer | Jens Axboe <jaxboe@fusionio.com> | 2010-10-19 09:13:04 +0200 |
commit | fa251f89903d73989e2f63e13d0eaed1e07ce0da (patch) | |
tree | 3f7fe779941e3b6d67754dd7c44a32f48ea47c74 /drivers/media/dvb/siano/smscoreapi.c | |
parent | dd3932eddf428571762596e17b65f5dc92ca361b (diff) | |
parent | cd07202cc8262e1669edff0d97715f3dd9260917 (diff) | |
download | op-kernel-dev-fa251f89903d73989e2f63e13d0eaed1e07ce0da.zip op-kernel-dev-fa251f89903d73989e2f63e13d0eaed1e07ce0da.tar.gz |
Merge branch 'v2.6.36-rc8' into for-2.6.37/barrier
Conflicts:
block/blk-core.c
drivers/block/loop.c
mm/swapfile.c
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/media/dvb/siano/smscoreapi.c')
-rw-r--r-- | drivers/media/dvb/siano/smscoreapi.c | 31 |
1 files changed, 12 insertions, 19 deletions
diff --git a/drivers/media/dvb/siano/smscoreapi.c b/drivers/media/dvb/siano/smscoreapi.c index d93468c..ff3b0fa 100644 --- a/drivers/media/dvb/siano/smscoreapi.c +++ b/drivers/media/dvb/siano/smscoreapi.c @@ -1098,33 +1098,26 @@ EXPORT_SYMBOL_GPL(smscore_onresponse); * * @return pointer to descriptor on success, NULL on error. */ -struct smscore_buffer_t *smscore_getbuffer(struct smscore_device_t *coredev) + +struct smscore_buffer_t *get_entry(struct smscore_device_t *coredev) { struct smscore_buffer_t *cb = NULL; unsigned long flags; - DEFINE_WAIT(wait); - spin_lock_irqsave(&coredev->bufferslock, flags); - - /* This function must return a valid buffer, since the buffer list is - * finite, we check that there is an available buffer, if not, we wait - * until such buffer become available. - */ - - prepare_to_wait(&coredev->buffer_mng_waitq, &wait, TASK_INTERRUPTIBLE); - if (list_empty(&coredev->buffers)) { - spin_unlock_irqrestore(&coredev->bufferslock, flags); - schedule(); - spin_lock_irqsave(&coredev->bufferslock, flags); + if (!list_empty(&coredev->buffers)) { + cb = (struct smscore_buffer_t *) coredev->buffers.next; + list_del(&cb->entry); } + spin_unlock_irqrestore(&coredev->bufferslock, flags); + return cb; +} - finish_wait(&coredev->buffer_mng_waitq, &wait); - - cb = (struct smscore_buffer_t *) coredev->buffers.next; - list_del(&cb->entry); +struct smscore_buffer_t *smscore_getbuffer(struct smscore_device_t *coredev) +{ + struct smscore_buffer_t *cb = NULL; - spin_unlock_irqrestore(&coredev->bufferslock, flags); + wait_event(coredev->buffer_mng_waitq, (cb = get_entry(coredev))); return cb; } |