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pci: Convert msi_init() to Error and fix callers to check it

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msi_init() reports errors with error_report(), which is wrong
when it's used in realize().

Fix by converting it to Error.

Fix its callers to handle failure instead of ignoring it.

For those callers who don't handle the failure, it might happen:
when user want msi on, but he doesn't get what he want because of
msi_init fails silently.

cc: Gerd Hoffmann <kraxel@redhat.com>
cc: John Snow <jsnow@redhat.com>
cc: Dmitry Fleytman <dmitry@daynix.com>
cc: Jason Wang <jasowang@redhat.com>
cc: Michael S. Tsirkin <mst@redhat.com>
cc: Hannes Reinecke <hare@suse.de>
cc: Paolo Bonzini <pbonzini@redhat.com>
cc: Alex Williamson <alex.williamson@redhat.com>
cc: Markus Armbruster <armbru@redhat.com>
cc: Marcel Apfelbaum <marcel@redhat.com>

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
This commit is contained in:
Cao jin 2016-06-20 14:13:39 +08:00 • committed by Michael S. Tsirkin
parent 69b205bb0b
commit 1108b2f8a9
15 changed files with 150 additions and 67 deletions
Download patch file Download diff file Expand all files Collapse all files

23
hw/usb/hcd-xhci.c
View file

@ -26,6 +26,7 @@
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "trace.h"
#include "qapi/error.h"
//#define DEBUG_XHCI
//#define DEBUG_DATA
@ -3581,6 +3582,7 @@ static void usb_xhci_init(XHCIState *xhci)
static void usb_xhci_realize(struct PCIDevice *dev, Error **errp)
{
int i, ret;
Error *err = NULL;
XHCIState *xhci = XHCI(dev);
@ -3591,6 +3593,23 @@ static void usb_xhci_realize(struct PCIDevice *dev, Error **errp)
usb_xhci_init(xhci);
if (xhci->msi != ON_OFF_AUTO_OFF) {
ret = msi_init(dev, 0x70, xhci->numintrs, true, false, &err);
/* Any error other than -ENOTSUP(board's MSI support is broken)
* is a programming error */
assert(!ret || ret == -ENOTSUP);
if (ret && xhci->msi == ON_OFF_AUTO_ON) {
/* Can't satisfy user's explicit msi=on request, fail */
error_append_hint(&err, "You have to use msi=auto (default) or "
"msi=off with this machine type.\n");
error_propagate(errp, err);
return;
}
assert(!err || xhci->msi == ON_OFF_AUTO_AUTO);
/* With msi=auto, we fall back to MSI off silently */
error_free(err);
}
if (xhci->numintrs > MAXINTRS) {
xhci->numintrs = MAXINTRS;
}
@ -3648,10 +3667,6 @@ static void usb_xhci_realize(struct PCIDevice *dev, Error **errp)
assert(ret >= 0);
}
if (xhci->msi != ON_OFF_AUTO_OFF) {
/* TODO check for errors */
msi_init(dev, 0x70, xhci->numintrs, true, false);
}
if (xhci->msix != ON_OFF_AUTO_OFF) {
/* TODO check for errors */
msix_init(dev, xhci->numintrs,