[v6,25/30] PNP: Don't reserve BARs for PCI when enabled movable BARs
diff mbox series

Message ID 20191024171228.877974-26-s.miroshnichenko@yadro.com
State New
Delegated to: Bjorn Helgaas
Headers show
  • PCI: Allow BAR movement during hotplug
Related show

Commit Message

Sergey Miroshnichenko Oct. 24, 2019, 5:12 p.m. UTC
When the Movable BARs feature is supported, the PCI subsystem is able to
distribute existing BARs and allocate the new ones itself, without need to
reserve gaps by BIOS.

CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko@yadro.com>
 drivers/pnp/system.c | 4 ++++
 1 file changed, 4 insertions(+)

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diff --git a/drivers/pnp/system.c b/drivers/pnp/system.c
index 6950503741eb..5977bd11f4d4 100644
--- a/drivers/pnp/system.c
+++ b/drivers/pnp/system.c
@@ -12,6 +12,7 @@ 
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/pci.h>
 #include <linux/kernel.h>
 #include <linux/ioport.h>
@@ -58,6 +59,9 @@  static void reserve_resources_of_dev(struct pnp_dev *dev)
 	struct resource *res;
 	int i;
+	if (pci_can_move_bars)
+		return;
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
 		if (res->flags & IORESOURCE_DISABLED)