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linux/arch/s390/pci
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Niklas Schnelle df057c914a s390/pci: Fix unexpected write combine on resource 
In the initial MIO support introduced in

commit 71ba41c9b1 ("s390/pci: provide support for MIO instructions")

zpci_map_resource() and zpci_setup_resources() default to using the
mio_wb address as the resource's start address. This means users of the
mapping, which includes most drivers, will get write combining on PCI
Stores. This may lead to problems when drivers expect write through
behavior when not using an explicit ioremap_wc().

Cc: stable@vger.kernel.org
Fixes: 71ba41c9b1 ("s390/pci: provide support for MIO instructions")
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2020-03-04 11:18:03 +01:00
..
Makefile s390/pci: move everything irq related to pci_irq.c 2019-04-29 10:47:01 +02:00
pci_clp.c s390/pci: Recover handle in clp_set_pci_fn() 2020-01-22 13:05:34 +01:00
pci_debug.c locking/atomic, s390/pci: Remove redundant casts 2019-06-03 12:32:57 +02:00
pci_dma.c dma-mapping updates for 5.4: 2019-09-19 13:27:23 -07:00
pci_event.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci_insn.c s390/pci: provide support for MIO instructions 2019-04-29 10:47:01 +02:00
pci_irq.c s390/pci: fix MSI message data 2019-09-16 13:21:51 +02:00
pci_mmio.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci_sysfs.c s390/pci: Fix possible deadlock in recover_store() 2020-01-22 13:05:34 +01:00
pci.c s390/pci: Fix unexpected write combine on resource 2020-03-04 11:18:03 +01:00