Commit 6d7d3c28 authored by Huisong Li's avatar Huisong Li Committed by Rafael J. Wysocki

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: ce028702 ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe")
Signed-off-by: default avatarHuisong Li <lihuisong@huawei.com>
Reviewed-by: default avatarSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent a10b1c99
...@@ -743,6 +743,7 @@ static int __init pcc_init(void) ...@@ -743,6 +743,7 @@ static int __init pcc_init(void)
if (IS_ERR(pcc_pdev)) { if (IS_ERR(pcc_pdev)) {
pr_debug("Err creating PCC platform bundle\n"); pr_debug("Err creating PCC platform bundle\n");
pcc_chan_count = 0;
return PTR_ERR(pcc_pdev); return PTR_ERR(pcc_pdev);
} }
......
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