[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v2] MSI: Robust resource release
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH v2] MSI: Robust resource release |
Date: |
Mon, 02 May 2011 20:00:47 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
msi_init may fail, so we need to check on uninit if the cap was
actually installed. This also avoids that the users need to check.
Signed-off-by: Jan Kiszka <address@hidden>
---
hw/ide/ich.c | 5 +----
hw/intel-hda.c | 4 +---
hw/msi.c | 12 ++++++++++--
3 files changed, 12 insertions(+), 9 deletions(-)
v2: Push cap check into msi_uninit (just like msix), remove check from
users.
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index a3d475c..8c1ff6c 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -110,10 +110,7 @@ static int pci_ich9_uninit(PCIDevice *dev)
struct AHCIPCIState *d;
d = DO_UPCAST(struct AHCIPCIState, card, dev);
- if (msi_enabled(dev)) {
- msi_uninit(dev);
- }
-
+ msi_uninit(dev);
qemu_unregister_reset(ahci_reset, d);
ahci_uninit(&d->ahci);
diff --git a/hw/intel-hda.c b/hw/intel-hda.c
index b0b1d12..093c4b9 100644
--- a/hw/intel-hda.c
+++ b/hw/intel-hda.c
@@ -1174,9 +1174,7 @@ static int intel_hda_exit(PCIDevice *pci)
{
IntelHDAState *d = DO_UPCAST(IntelHDAState, pci, pci);
- if (d->msi) {
- msi_uninit(&d->pci);
- }
+ msi_uninit(&d->pci);
cpu_unregister_io_memory(d->mmio_addr);
return 0;
}
diff --git a/hw/msi.c b/hw/msi.c
index 0cbf89f..3141804 100644
--- a/hw/msi.c
+++ b/hw/msi.c
@@ -183,9 +183,17 @@ int msi_init(struct PCIDevice *dev, uint8_t offset,
void msi_uninit(struct PCIDevice *dev)
{
- uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
- uint8_t cap_size = msi_cap_sizeof(flags);
+ uint16_t flags;
+ uint8_t cap_size;
+
+ if (!(dev->cap_present & QEMU_PCI_CAP_MSI)) {
+ return;
+ }
+ flags = pci_get_word(dev->config + msi_flags_off(dev));
+ cap_size = msi_cap_sizeof(flags);
pci_del_capability(dev, PCI_CAP_ID_MSIX, cap_size);
+ dev->cap_present &= ~QEMU_PCI_CAP_MSI;
+
MSI_DEV_PRINTF(dev, "uninit\n");
}
--
1.7.1