lkml.org 
[lkml]   [2022]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] mailbox: pcc: fix 'pcc_chan_count' when fail to initialize PCC
Date
Currently, 'pcc_chan_count' is a non-zero value if PCC subspaces are parsed
successfully and subsequent processes is failure during initializing PCC
process. This may cause that pcc_mbox_request_channel() can still be
executed successfully , which will misleads the caller that this channel is
available.

Fixes: ce028702ddbc ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe")
Signed-off-by: Huisong Li <lihuisong@huawei.com>
---
drivers/mailbox/pcc.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 7cee37dd3b73..47d70c5884e3 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -294,6 +294,7 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
pr_err("Channel not found for idx: %d\n", subspace_id);
return ERR_PTR(-EBUSY);
}
+
dev = chan->mbox->dev;

spin_lock_irqsave(&chan->lock, flags);
@@ -735,7 +736,8 @@ static int __init pcc_init(void)

if (ret) {
pr_debug("ACPI PCC probe failed.\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto out;
}

pcc_pdev = platform_create_bundle(&pcc_mbox_driver,
@@ -743,10 +745,13 @@ static int __init pcc_init(void)

if (IS_ERR(pcc_pdev)) {
pr_debug("Err creating PCC platform bundle\n");
- return PTR_ERR(pcc_pdev);
+ ret = PTR_ERR(pcc_pdev);
+ goto out;
}

- return 0;
+out:
+ pcc_chan_count = 0;
+ return ret;
}

/*
--
2.22.0
\
 
 \ /
  Last update: 2022-11-10 02:53    [W:0.749 / U:0.460 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site