Patch "PCI,parisc: Enable 64-bit bus addresses on PA-RISC" has been added to the 4.2-stable tree

This is a note to let you know that I've just added the patch titled

PCI,parisc: Enable 64-bit bus addresses on PA-RISC

to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
pci-parisc-enable-64-bit-bus-addresses-on-pa-risc.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Helge Deller <[email protected]>
Date: Wed, 2 Sep 2015 18:17:29 +0200
Subject: PCI,parisc: Enable 64-bit bus addresses on PA-RISC

From: Helge Deller <[email protected]>

commit e02a653e15d8d32e9e768fd99a3271aafe5c5d77 upstream.

Commit 3a9ad0b ("PCI: Add pci_bus_addr_t") unconditionally introduced usage of 64-bit PCI bus addresses on all 64-bit platforms which broke PA-RISC.

It turned out that due to enabling the 64-bit addresses, the PCI logic decided to use the GMMIO instead of the LMMIO region. This commit simply disables registering the GMMIO and thus we fall back to use the LMMIO region as before.

Reverts commit 45ea2a5fed6dacb9bb0558d8b21eacc1c45d5bb4 ("PCI: Don't use 64-bit bus addresses on PA-RISC")

To: [email protected]

---
 drivers/parisc/lba_pci.c |    7 +++++--
 drivers/pci/Kconfig      |    2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

@@ -1556,8 +1556,11 @@ lba_driver_probe(struct parisc_device *d
 	if (lba_dev->hba.lmmio_space.flags)
 		pci_add_resource_offset(&resources, &lba_dev->hba.lmmio_space,
 					lba_dev->hba.lmmio_space_offset);
-	if (lba_dev->hba.gmmio_space.flags)
-		pci_add_resource(&resources, &lba_dev->hba.gmmio_space);
+	if (lba_dev->hba.gmmio_space.flags) {
+		/* pci_add_resource(&resources, &lba_dev->hba.gmmio_space); */
+		pr_warn("LBA: Not registering GMMIO space %pR\n",
+			&lba_dev->hba.gmmio_space);
+	}
 
 	pci_add_resource(&resources, &lba_dev->hba.bus_num);
 

@@ -2,7 +2,7 @@
 # PCI configuration
 #
 config PCI_BUS_ADDR_T_64BIT
-	def_bool y if (ARCH_DMA_ADDR_T_64BIT || (64BIT && !PARISC))
+	def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
 	depends on PCI
 
 config PCI_MSI

Patches currently in stable-queue which might be from [email protected] are

queue-4.2/parisc-use-double-word-condition-in-64bit-cas-operation.patch queue-4.2/parisc-filter-out-spurious-interrupts-in-pa-risc-irq-handler.patch queue-4.2/pci-parisc-enable-64-bit-bus-addresses-on-pa-risc.patch