linux/drivers/misc/cxl
Christophe Lombard 4fc0870d7e cxl: Fix memory page not handled
The in-kernel 'library' API can be called by drivers to help
interaction with an IBM XSL on a POWER9 system.

The cxllib_handle_fault() API is used to handle memory fault. All memory
pages of the specified buffer have to be handled but under certain
conditions,the last page may not be touched, and the address the
adapter is trying to access is never sent to the kernel for resolution.

This patch reworks start address of the loop with an address aligned on
the page size. In this context, the last page is not missed.

Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>

Fixes: 3ced8d7300 ("cxl: Export library to support IBM XSL");
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-09-29 14:19:44 +10:00
..
api.c cxl: Fix driver use count 2017-08-31 14:26:49 +10:00
base.c cxl: Add support for interrupts on the Mellanox CX4 2016-07-14 20:27:08 +10:00
context.c cxl: Fixes for Coherent Accelerator Interface Architecture 2.0 2017-06-23 16:26:23 +10:00
cxl.h cxl: Export library to support IBM XSL 2017-07-03 23:07:03 +10:00
cxllib.c cxl: Fix memory page not handled 2017-09-29 14:19:44 +10:00
debugfs.c cxl: Add psl9 specific code 2017-04-13 23:34:31 +10:00
fault.c powerpc/mm/cxl: Add barrier when setting mm cpumask 2017-08-31 14:26:39 +10:00
file.c cxl: Fix driver use count 2017-08-31 14:26:49 +10:00
flash.c cxl: Unlock on error in probe 2017-06-06 19:23:52 +10:00
guest.c cxl: Add psl9 specific code 2017-04-13 23:34:31 +10:00
hcalls.c cxl: Remove unused values in bare-metal environment. 2017-04-13 23:34:28 +10:00
hcalls.h cxl: Add guest-specific code 2016-03-09 23:36:52 +11:00
irq.c cxl: Add psl9 specific code 2017-04-13 23:34:31 +10:00
Kconfig cxl: Export library to support IBM XSL 2017-07-03 23:07:03 +10:00
main.c cxl: Fixes for Coherent Accelerator Interface Architecture 2.0 2017-06-23 16:26:23 +10:00
Makefile cxl: Export library to support IBM XSL 2017-07-03 23:07:03 +10:00
native.c cxl: Export library to support IBM XSL 2017-07-03 23:07:03 +10:00
of.c cxl: replace loop with for_each_child_of_node(), remove unneeded of_node_put() 2016-10-04 16:19:23 +11:00
pci.c mm: treewide: remove GFP_TEMPORARY allocation flag 2017-09-13 18:53:16 -07:00
phb.c cxl: Fix error handling in _cxl_pci_associate_default_context() 2016-11-18 22:41:08 +11:00
sysfs.c cxl: Prevent adapter reset if an active context exists 2016-10-19 20:35:39 +11:00
trace.c cxl: Add tracepoints 2015-01-22 17:31:51 +11:00
trace.h cxl: Add psl9 specific code 2017-04-13 23:34:31 +10:00
vphb.c cxl: fix nested locking hang during EEH hotplug 2017-02-21 21:32:52 +11:00