Commit d23cacb3 authored May 28, 2017 by Amir Samuelov Committed by Gerrit - the friendly Code Review server May 30, 2017

spcom: open channel return EBUSY when channel in use



The char device /dev/sp_kernel is used for loading SP application and
creating new channel char device, therefore might be temporary busy.
Return EBUSY error to user system call open() so it can retry.

Change-Id: I230577fe6b03ac7afd7175f72f9a3fa80db5a524
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>

parent ace73576

drivers/soc/qcom/spcom.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -718,8 +718,10 @@ static int spcom_open(struct spcom_channel *ch, unsigned int timeout_msec)

		/* only one client/server may use the channel */
		if (ch->ref_count) {
		pr_err("channel [%s] already in use.\n", name);
		goto exit_err;
		pr_err("channel [%s] is BUSY, already in use by pid [%d].\n",
		name, ch->pid);
		mutex_unlock(&ch->lock);
		return -EBUSY;
		}

		pr_debug("ch [%s] opened by PID [%d], count [%d]\n",