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authorDavid Woodhouse <David.Woodhouse@intel.com>2010-10-30 12:35:11 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-10-30 12:35:11 +0100
commit67577927e8d7a1f4b09b4992df640eadc6aacb36 (patch)
tree2e9efe6b5745965faf0dcc084d4613d9356263f9 /drivers/media/dvb/siano/smscoreapi.c
parent6fe4c590313133ebd5dadb769031489ff178ece1 (diff)
parent51f00a471ce8f359627dd99aeac322947a0e491b (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Conflicts: drivers/mtd/mtd_blkdevs.c Merge Grant's device-tree bits so that we can apply the subsequent fixes. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/media/dvb/siano/smscoreapi.c')
-rw-r--r--drivers/media/dvb/siano/smscoreapi.c31
1 files changed, 12 insertions, 19 deletions
diff --git a/drivers/media/dvb/siano/smscoreapi.c b/drivers/media/dvb/siano/smscoreapi.c
index d93468cd3a8..ff3b0fa901b 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;
}