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dm: pci: Fix device PCI iteration 

When there is no PCI bus uclass_first_device will return no bus and no
error which will result in pci_find_first_device calling
skip_to_next_device with no bus, and the bus is only checked at the end
of the while cycle, not the beginning.

Fixes: 76c3fbcd3d ("dm: pci: Add a way to iterate through all PCI devices")
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Michal Suchanek 2022-10-12 21:57:52 +02:00 committed by Simon Glass
parent c0648b7b9d
commit 5afe93a18c
1 changed files with 2 additions and 2 deletions
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4
drivers/pci/pci-uclass.c
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@ -1217,7 +1217,7 @@ static int skip_to_next_device(struct udevice *bus, struct udevice **devp)
* Scan through all the PCI controllers. On x86 there will only be one * Scan through all the PCI controllers. On x86 there will only be one
* but that is not necessarily true on other hardware. * but that is not necessarily true on other hardware.
*/ */
do { while (bus) {
device_find_first_child(bus, &dev); device_find_first_child(bus, &dev);
if (dev) { if (dev) {
*devp = dev; *devp = dev;
@ -1226,7 +1226,7 @@ static int skip_to_next_device(struct udevice *bus, struct udevice **devp)
ret = uclass_next_device(&bus); ret = uclass_next_device(&bus);
if (ret) if (ret)
return ret; return ret;
} while (bus); }
return 0; return 0;
} }