OpenCloudOS-Kernel/drivers/pci/msi
Thomas Gleixner e3c026be4d PCI/MSI: Remove over-zealous hardware size check in pci_msix_validate_entries()
pci_msix_validate_entries() validates the entries array which is handed in
by the caller for a MSI-X interrupt allocation. Aside of consistency
failures it also detects a failure when the size of the MSI-X hardware table
in the device is smaller than the size of the entries array.

That's wrong for the case of range allocations where the caller provides
the minimum and the maximum number of vectors to allocate, when the
hardware size is greater or equal than the mininum, but smaller than the
maximum.

Remove the hardware size check completely from that function and just
ensure that the entires array up to the maximum size is consistent.

The limitation and range checking versus the hardware size happens
independently of that afterwards anyway because the entries array is
optional.

Fixes: 4644d22eb6 ("PCI/MSI: Validate MSI-X contiguous restriction early")
Reported-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/87v8i3sg62.ffs@tglx
2023-04-16 14:11:51 +02:00
..
Makefile PCI/MSI: Move pci_disable_msi() to api.c 2022-11-17 15:15:20 +01:00
api.c PCI/MSI: Clarify usage of pci_msix_free_irq() 2023-02-21 08:25:14 +01:00
irqdomain.c PCI/MSI: Provide IMS (Interrupt Message Store) support 2022-12-05 22:22:34 +01:00
legacy.c PCI/MSI: Prevent UAF in error path 2022-01-21 02:14:46 +01:00
msi.c PCI/MSI: Remove over-zealous hardware size check in pci_msix_validate_entries() 2023-04-16 14:11:51 +02:00
msi.h PCI/MSI: Split MSI-X descriptor setup 2022-12-05 22:22:34 +01:00
pcidev_msi.c