diff mbox series

[v8,12/17] PCI: hold the rescan mutex when scanning for the first time

Message ID 20240528-pwrseq-v8-12-d354d52b763c@linaro.org
State New
Headers show
Series power: sequencing: implement the subsystem and add first users | expand

Commit Message

Bartosz Golaszewski May 28, 2024, 7:03 p.m. UTC 
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

With the introduction of PCI device power control drivers that will be
able to trigger the port rescan when probing, we need to hold the rescan
mutex during the initial pci_host_probe() too or the two could get in
each other's way.

Tested-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/pci/probe.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8e696e547565..604fc96b1098 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -3072,7 +3072,9 @@  int pci_host_probe(struct pci_host_bridge *bridge)
 	struct pci_bus *bus, *child;
 	int ret;
 
+	pci_lock_rescan_remove();
 	ret = pci_scan_root_bus_bridge(bridge);
+	pci_unlock_rescan_remove();
 	if (ret < 0) {
 		dev_err(bridge->dev.parent, "Scanning root bridge failed");
 		return ret;