diff options
| author | Christian Gromm <christian.gromm@microchip.com> | 2015-09-28 17:18:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-29 03:18:51 +0200 |
| commit | 71457d482751a38e78da32fde80e87b6f670c389 (patch) | |
| tree | 5a5c845fb2a78d9c33ee48b1448473316af73cfa /drivers/staging/most/aim-cdev | |
| parent | c81c9c3e0fd5170e7bede7d06202062338644e93 (diff) | |
| download | linux-71457d482751a38e78da32fde80e87b6f670c389.tar.bz2 | |
staging: most: add fair buffer distribution
This patch ensures a fair distribution of buffers, when two AIMs share a
single channel. The AIMs then won't be able to use more than half of all
pre-allocated buffers of the linked channel. However, in case the channel
is not shared, the AIM can exclusively use all available buffers.
Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/most/aim-cdev')
| -rw-r--r-- | drivers/staging/most/aim-cdev/cdev.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/staging/most/aim-cdev/cdev.c b/drivers/staging/most/aim-cdev/cdev.c index a8a7689231ac..23c3f6e7340c 100644 --- a/drivers/staging/most/aim-cdev/cdev.c +++ b/drivers/staging/most/aim-cdev/cdev.c @@ -165,7 +165,7 @@ static ssize_t aim_write(struct file *filp, const char __user *buf, } mutex_unlock(&channel->io_mutex); - mbo = most_get_mbo(channel->iface, channel->channel_id); + mbo = most_get_mbo(channel->iface, channel->channel_id, &cdev_aim); if (!mbo) { if ((filp->f_flags & O_NONBLOCK)) @@ -173,7 +173,8 @@ static ssize_t aim_write(struct file *filp, const char __user *buf, if (wait_event_interruptible( channel->wq, (mbo = most_get_mbo(channel->iface, - channel->channel_id)) || + channel->channel_id, + &cdev_aim)) || (!channel->dev))) return -ERESTARTSYS; } |