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)
committerBjorn Helgaas <bhelgaas@google.com>
Fri, 20 Nov 2020 16:52:27 +0000 (10:52 -0600)
commitf83c37941e881224885f2e694e0626bea358e96b
treee7050a3fead58b5a0055a3f73e7456db24404ea4
parentf8394f232b1eab649ce2df5c5f15b0e528c92091
PCI: Disable MSI for Pericom PCIe-USB adapter

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>
drivers/pci/quirks.c