Module: xenomai-2.5
Branch: master
Commit: 2b1efb3818166b57bfa87286309243a1aa20914c
URL:
http://git.xenomai.org/?p=xenomai-2.5.git;a=commit;h=2b1efb3818166b57bfa87286309243a1aa20914c
Author: Daniele Nicolodi <nicol...@science.unitn.it>
Date: Fri Mar 19 00:17:23 2010 +0100
analogy: fix a bug in a4l_ioctl_bufinfo when idle
---
ksrc/drivers/analogy/buffer.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/ksrc/drivers/analogy/buffer.c b/ksrc/drivers/analogy/buffer.c
index aa6acac..bbd79ec 100644
--- a/ksrc/drivers/analogy/buffer.c
+++ b/ksrc/drivers/analogy/buffer.c
@@ -557,6 +557,14 @@ int a4l_ioctl_bufinfo(a4l_cxt_t * cxt, void *arg)
buf = dev->transfer.bufs[info.idx_subd];
+ /* If a transfer is not occuring, simply return buffer
+ informations, otherwise make the transfer progress */
+ if (!test_bit(A4L_TSF_BUSY,
+ &(dev->transfer.status[info.idx_subd]))) {
+ info.rw_count = 0;
+ goto a4l_ioctl_bufinfo_out;
+ }
+
ret = __handle_event(buf);
if (info.idx_subd == dev->transfer.idx_read_subd) {
@@ -618,6 +626,8 @@ int a4l_ioctl_bufinfo(a4l_cxt_t * cxt, void *arg)
buf->mng_count += tmp_cnt;
}
+a4l_ioctl_bufinfo_out:
+
/* Sets the buffer size */
info.buf_size = buf->size;
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