]> git.itanic.dy.fi Git - linux-stable/commit
x86/pci/xen: populate MSI sysfs entries
authorMaximilian Heyne <mheyne@amazon.de>
Wed, 3 May 2023 13:16:53 +0000 (13:16 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 30 May 2023 13:17:26 +0000 (14:17 +0100)
commit6f46281385ff87135b69c573ced5786c8ba7a9ae
tree74248aaecfa2b76f67711177b68b0c29ee57ed7d
parentb95aca006584e6cf2b328a7d2d737d707f158373
x86/pci/xen: populate MSI sysfs entries

commit 335b4223466dd75f9f3ea4918187afbadd22e5c8 upstream.

Commit bf5e758f02fc ("genirq/msi: Simplify sysfs handling") reworked the
creation of sysfs entries for MSI IRQs. The creation used to be in
msi_domain_alloc_irqs_descs_locked after calling ops->domain_alloc_irqs.
Then it moved into __msi_domain_alloc_irqs which is an implementation of
domain_alloc_irqs. However, Xen comes with the only other implementation
of domain_alloc_irqs and hence doesn't run the sysfs population code
anymore.

Commit 6c796996ee70 ("x86/pci/xen: Fixup fallout from the PCI/MSI
overhaul") set the flag MSI_FLAG_DEV_SYSFS for the xen msi_domain_info
but that doesn't actually have an effect because Xen uses it's own
domain_alloc_irqs implementation.

Fix this by making use of the fallback functions for sysfs population.

Fixes: bf5e758f02fc ("genirq/msi: Simplify sysfs handling")
Signed-off-by: Maximilian Heyne <mheyne@amazon.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20230503131656.15928-1-mheyne@amazon.de
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/x86/pci/xen.c
include/linux/msi.h
kernel/irq/msi.c