PCI: Disable MSI for Pericom PCIe-USB adapter
authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Fri, 6 Nov 2020 10:05:25 +0000 (12:05 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 Dec 2020 10:53:18 +0000 (11:53 +0100)
commitddf1dab2919b15c29f1cc1baa9546b5d686afd95
treef62211f546bc730fb01c5d2f90902188832a3290
parent6cf9c3f4dfa07837acb520256091b21d315cfda8
PCI: Disable MSI for Pericom PCIe-USB adapter

[ Upstream commit f83c37941e881224885f2e694e0626bea358e96b ]

Pericom PCIe-USB adapter advertises MSI, but documentation says "The MSI
Function is not implemented on this device" in chapters 7.3.27,
7.3.29-7.3.31, and Alberto found that MSI in fact does not work.

Disable MSI for these devices.

Datasheet: https://www.diodes.com/assets/Datasheets/PI7C9X440SL.pdf
Fixes: 306c54d0edb6 ("usb: hcd: Try MSI interrupts on PCI devices")
Link: https://lore.kernel.org/linux-usb/20201030134826.GP4077@smile.fi.intel.com/
Link: https://lore.kernel.org/r/20201106100526.17726-1-andriy.shevchenko@linux.intel.com
Reported-by: alberto.vignani@fastwebnet.it
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/pci/quirks.c