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authorHuisong Li <lihuisong@huawei.com>2022-11-12 05:05:28 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2022-11-23 21:06:56 +0300
commit6d7d3c287410c0ad499e478e2338dc3d7e3392b1 (patch)
tree3d6a4de29b2b6fde6fa424af09f5f24d2d73605d /drivers/mailbox
parenta10b1c99e2dccee69838b512419843c21b2b87f8 (diff)
downloadlinux-6d7d3c287410c0ad499e478e2338dc3d7e3392b1.tar.xz
mailbox: pcc: Reset pcc_chan_count to zero in case of PCC probe failure
Currently, 'pcc_chan_count' is remains set to a non-zero value if PCC subspaces are parsed successfully but something else fail later during the initial PCC probing phase. This will result in pcc_mbox_request_channel trying to access the resources that are not initialised or allocated and may end up in a system crash. Reset pcc_chan_count to 0 when the PCC probe fails in order to prevent the possible issue as described above. Fixes: ce028702ddbc ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe") Signed-off-by: Huisong Li <lihuisong@huawei.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/pcc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 3c2bc0ca454c..105d46c9801b 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -743,6 +743,7 @@ static int __init pcc_init(void)
if (IS_ERR(pcc_pdev)) {
pr_debug("Err creating PCC platform bundle\n");
+ pcc_chan_count = 0;
return PTR_ERR(pcc_pdev);
}