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linux/arch/powerpc
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Frederic Barrat 17328f218f powerpc/xive: Discard ESB load value when interrupt is invalid 
A load on an ESB page returning all 1's means that the underlying
device has invalidated the access to the PQ state of the interrupt
through mmio. It may happen, for example when querying a PHB interrupt
while the PHB is in an error state.

In that case, we should consider the interrupt to be invalid when
checking its state in the irq_get_irqchip_state() handler.

Fixes: da15c03b04 ("powerpc/xive: Implement get_irqchip_state method for XIVE to fix shutdown race")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
[clg: wrote a commit log, introduced XIVE_ESB_INVALID ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200113130118.27969-1-clg@kaod.org
2020-01-22 20:31:41 +11:00
..
boot Devicetree updates for v5.5: 2019-12-02 11:41:35 -08:00
configs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2019-12-01 13:26:18 -08:00
crypto powerpc updates for 5.5 2019-11-30 14:35:43 -08:00
include powerpc/xive: Discard ESB load value when interrupt is invalid 2020-01-22 20:31:41 +11:00
kernel powerpc/irq: fix stack overflow verification 2019-12-14 07:59:36 +11:00
kexec powerpc: Avoid clang warnings around setjmp and longjmp 2019-11-25 21:45:43 +11:00
kvm PPC: 2019-12-22 10:26:59 -08:00
lib powerpc: Fix __clear_user() with KUAP enabled 2019-12-16 23:19:44 +11:00
math-emu
mm powerpc/mm: Mark get_slice_psize() & slice_addr_is_low() as notrace 2019-12-23 21:12:51 +11:00
net treewide: Use sizeof_field() macro 2019-12-09 10:36:44 -08:00
oprofile
perf powerpc updates for 5.5 2019-11-30 14:35:43 -08:00
platforms powerpc/pseries/cmm: fix managed page counts when migrating pages between zones 2019-12-16 23:15:16 +11:00
purgatory
sysdev powerpc/xive: Discard ESB load value when interrupt is invalid 2020-01-22 20:31:41 +11:00
tools
xmon powerpc: Avoid clang warnings around setjmp and longjmp 2019-11-25 21:45:43 +11:00
Kbuild powerpc/kexec: Move kexec files into a dedicated subdir. 2019-11-21 15:41:34 +11:00
Kconfig powerpc: Ultravisor: Fix the dependencies for CONFIG_PPC_UV 2020-01-22 20:31:40 +11:00
Kconfig.debug powerpc: Fix Kconfig indentation 2019-11-25 21:45:43 +11:00
Makefile powerpc: Don't add -mabi= flags when building with Clang 2019-11-25 21:45:43 +11:00
Makefile.postlink