5.4-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Gleixner tglx@linutronix.de
[ Upstream commit 3998527d2e3ee2bfdf710a45b7b90968ff87babc ]
The PCI core already ensures that the MSI[-X] state is correct when MSI[-X] is disabled. For MSI the reset state is all entries unmasked and for MSI-X all vectors are masked.
S390 masks all MSI entries and masks the already masked MSI-X entries again. Remove it and let the device in the correct state.
Signed-off-by: Thomas Gleixner tglx@linutronix.de Tested-by: Niklas Schnelle schnelle@linux.ibm.com Tested-by: Marc Zyngier maz@kernel.org Reviewed-by: Marc Zyngier maz@kernel.org Acked-by: Niklas Schnelle schnelle@linux.ibm.com Link: https://lore.kernel.org/r/20210729222542.939798136@linutronix.de Stable-dep-of: ab42fcb511fd ("s390/pci: Allow allocation of more than 1 MSI interrupt") Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/pci/pci_irq.c | 4 ---- drivers/pci/msi.c | 4 ++-- include/linux/msi.h | 2 -- 3 files changed, 2 insertions(+), 8 deletions(-)
diff --git a/arch/s390/pci/pci_irq.c b/arch/s390/pci/pci_irq.c index 75217fb63d7b3..5036e00b7ec1b 100644 --- a/arch/s390/pci/pci_irq.c +++ b/arch/s390/pci/pci_irq.c @@ -341,10 +341,6 @@ void arch_teardown_msi_irqs(struct pci_dev *pdev) for_each_pci_msi_entry(msi, pdev) { if (!msi->irq) continue; - if (msi->msi_attrib.is_msix) - __pci_msix_desc_mask_irq(msi, 1); - else - __pci_msi_desc_mask_irq(msi, 1, 1); irq_set_msi_desc(msi->irq, NULL); irq_free_desc(msi->irq); msi->msg.address_lo = 0; diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 1701d3de24da7..a37e3541c9377 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -170,7 +170,7 @@ static inline __attribute_const__ u32 msi_mask(unsigned x) * reliably as devices without an INTx disable bit will then generate a * level IRQ which will never be cleared. */ -void __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag) +static void __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag) { raw_spinlock_t *lock = &desc->dev->msi_lock; unsigned long flags; @@ -207,7 +207,7 @@ static void __iomem *pci_msix_desc_addr(struct msi_desc *desc) * file. This saves a few milliseconds when initialising devices with lots * of MSI-X interrupts. */ -u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag) +static u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag) { u32 mask_bits = desc->masked; void __iomem *desc_addr; diff --git a/include/linux/msi.h b/include/linux/msi.h index 758e32f0d4434..31193305807d0 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -193,8 +193,6 @@ void free_msi_entry(struct msi_desc *entry); void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
-u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag); -void __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); void pci_msi_mask_irq(struct irq_data *data); void pci_msi_unmask_irq(struct irq_data *data);