diff options
| author | Cédric Le Goater <clg@kaod.org> | 2021-07-01 15:27:26 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-10 15:14:58 +0200 |
| commit | 07817a578a7a79638537480b8847dc7a12f293c5 (patch) | |
| tree | 747d367763831cfe5d2e033e50991bd00f3f272d /arch/powerpc/platforms/pseries/msi.c | |
| parent | powerpc/xive: Remove irqd_is_started() check when setting the affinity (diff) | |
| download | linux-07817a578a7a79638537480b8847dc7a12f293c5.tar.xz linux-07817a578a7a79638537480b8847dc7a12f293c5.zip | |
powerpc/pseries/pci: Add a domain_free_irqs() handler
The RTAS firmware can not disable one MSI at a time. It's all or
nothing. We need a custom free IRQ handler for that.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-9-clg@kaod.org
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/platforms/pseries/msi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index 86c6809ebac2..591cee9cbc9e 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -529,8 +529,24 @@ static int pseries_msi_ops_prepare(struct irq_domain *domain, struct device *dev return rtas_prepare_msi_irqs(pdev, nvec, type, arg); } +/* + * RTAS can not disable one MSI at a time. It's all or nothing. Do it + * at the end after all IRQs have been freed. + */ +static void pseries_msi_domain_free_irqs(struct irq_domain *domain, + struct device *dev) +{ + if (WARN_ON_ONCE(!dev_is_pci(dev))) + return; + + __msi_domain_free_irqs(domain, dev); + + rtas_disable_msi(to_pci_dev(dev)); +} + static struct msi_domain_ops pseries_pci_msi_domain_ops = { .msi_prepare = pseries_msi_ops_prepare, + .domain_free_irqs = pseries_msi_domain_free_irqs, }; static void pseries_msi_shutdown(struct irq_data *d) |