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PCI: Hold the rescan mutex when scanning for the first time

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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>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK
Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20240612082019.19161-2-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2024-06-12 10:20:14 +02:00
parent 2f1630f437
commit 5799eba8ee
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/probe.c
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@ -3069,7 +3069,9 @@ 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;