]> www.infradead.org Git - users/jedix/linux-maple.git/commit
PCI: Don't use 64-bit bus addresses on PA-RISC
authorBjorn Helgaas <bhelgaas@google.com>
Thu, 20 Aug 2015 05:08:15 +0000 (00:08 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 13 Sep 2015 16:07:49 +0000 (09:07 -0700)
commit7aadce453a529fdca8d8e2d4d7d494f9646748c4
tree6542d97fb40ab53db0f692f2a587feb4d75801cd
parente1768fd6fdba1345321ab350f60ec109cb832c01
PCI: Don't use 64-bit bus addresses on PA-RISC

commit 45ea2a5fed6dacb9bb0558d8b21eacc1c45d5bb4 upstream.

Meelis and Helge reported that 3a9ad0b4fdcd ("PCI: Add pci_bus_addr_t")
caused HPMCs on A500 and hangs on rp5470.

PA-RISC does not set ARCH_DMA_ADDR_T_64BIT, even for 64-bit kernels, so
prior to 3a9ad0b4fdcd, we always used 32-bit PCI addresses.  After
3a9ad0b4fdcd, we do use 64-bit PCI addresses in 64-bit kernels, and
apparently there's some PA-RISC problem related to them.

Fixes: 3a9ad0b4fdcd ("PCI: Add pci_bus_addr_t")
Link: http://lkml.kernel.org/r/alpine.LRH.2.11.1507260929000.30065@math.ut.ee
Reported-by: Meelis Roos <mroos@linux.ee>
Reported-by: Helge Deller <deller@gmx.de>
Tested-by: Helge Deller <deller@gmx.de>
Based-on-idea-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/pci/Kconfig