evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

spcom: always wait for glink LOCAL_DISCONNECT event after glink_close()

Browse source 
Wait for glink LOCAL_DISCONNECT event, even if the channel is not
connected.

Change-Id: I03f20b6dbb2f46d7abd6996e8d298e991cf3f82b
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>
This commit is contained in:
Amir Samuelov 2017-04-06 17:28:22 +03:00 • committed by Gerrit - the friendly Code Review server
parent 6cf6835d96
commit cefed44f00
1 changed files with 12 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
drivers/soc/qcom/spcom.c
View file

@ -463,8 +463,7 @@ static void spcom_notify_state(void *handle, const void *priv, unsigned event)
switch (event) {
case GLINK_CONNECTED:
pr_debug("GLINK_CONNECTED, ch name [%s].\n", ch->name);
complete_all(&ch->connect);
ch->glink_state = event;
/*
* if spcom_notify_state() is called within glink_open()
* then ch->glink_handle is not updated yet.
@ -484,6 +483,7 @@ static void spcom_notify_state(void *handle, const void *priv, unsigned event)
ch->rx_buf_size);
ch->rx_buf_ready = true;
}
complete_all(&ch->connect);
break;
case GLINK_LOCAL_DISCONNECTED:
/*
@ -491,6 +491,7 @@ static void spcom_notify_state(void *handle, const void *priv, unsigned event)
* only after *both* sides closed the channel.
*/
pr_debug("GLINK_LOCAL_DISCONNECTED, ch [%s].\n", ch->name);
ch->glink_state = event;
complete_all(&ch->disconnect);
break;
case GLINK_REMOTE_DISCONNECTED:
@ -501,6 +502,8 @@ static void spcom_notify_state(void *handle, const void *priv, unsigned event)
*/
pr_err("GLINK_REMOTE_DISCONNECTED, ch [%s].\n", ch->name);
ch->glink_state = event;
/*
* Abort any blocking read() operation.
* The glink notification might be after REMOTE_DISCONNECT.
@ -518,8 +521,6 @@ static void spcom_notify_state(void *handle, const void *priv, unsigned event)
(int) event, ch->name);
return;
}
ch->glink_state = event;
}
/**
@ -2132,7 +2133,6 @@ static int spcom_device_release(struct inode *inode, struct file *filp)
{
struct spcom_channel *ch;
const char *name = file_to_filename(filp);
bool connected = false;
pr_debug("Close file [%s].\n", name);
@ -2154,19 +2154,18 @@ static int spcom_device_release(struct inode *inode, struct file *filp)
}
/* channel might be already closed or disconnected */
if (spcom_is_channel_open(ch) && spcom_is_channel_connected(ch))
connected = true;
if (!spcom_is_channel_open(ch)) {
pr_err("ch [%s] already closed.\n", name);
return 0;
}
reinit_completion(&ch->disconnect);
spcom_close(ch);
if (connected) {
pr_debug("Wait for event GLINK_LOCAL_DISCONNECTED, ch [%s].\n",
name);
wait_for_completion(&ch->disconnect);
pr_debug("GLINK_LOCAL_DISCONNECTED signaled, ch [%s].\n", name);
}
pr_debug("Wait for event GLINK_LOCAL_DISCONNECTED, ch [%s].\n", name);
wait_for_completion(&ch->disconnect);
pr_debug("GLINK_LOCAL_DISCONNECTED signaled, ch [%s].\n", name);
return 0;
}