Author: kib
Date: Tue Jul 16 20:14:23 2013
New Revision: 253398
URL: http://svnweb.freebsd.org/changeset/base/253398
Log:
Add a tunable to force disable MSI use for xhci(4).
Requested and tested by: delphij
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Modified:
head/sys/dev/usb/controller/xhci_pci.c
Modified: head/sys/dev/usb/controller/xhci_pci.c
==============================================================================
--- head/sys/dev/usb/controller/xhci_pci.c Tue Jul 16 19:20:50 2013
(r253397)
+++ head/sys/dev/usb/controller/xhci_pci.c Tue Jul 16 20:14:23 2013
(r253398)
@@ -132,6 +132,9 @@ xhci_pci_probe(device_t self)
}
}
+static int xhci_use_msi = 1;
+TUNABLE_INT("hw.usb.xhci.msi", &xhci_use_msi);
+
static void
xhci_interrupt_poll(void *_sc)
{
@@ -171,13 +174,15 @@ xhci_pci_attach(device_t self)
usb_callout_init_mtx(&sc->sc_callout, &sc->sc_bus.bus_mtx, 0);
sc->sc_irq_rid = 0;
- count = pci_msi_count(self);
- if (count >= 1) {
- count = 1;
- if (pci_alloc_msi(self, &count) == 0) {
- if (bootverbose)
- device_printf(self, "MSI enabled\n");
- sc->sc_irq_rid = 1;
+ if (xhci_use_msi) {
+ count = pci_msi_count(self);
+ if (count >= 1) {
+ count = 1;
+ if (pci_alloc_msi(self, &count) == 0) {
+ if (bootverbose)
+ device_printf(self, "MSI enabled\n");
+ sc->sc_irq_rid = 1;
+ }
}
}
sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ,
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
