diff options
| author | Zhenzhong Duan <zhenzhong.duan@oracle.com> | 2014-05-07 13:41:48 +0000 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2014-05-07 16:14:41 +0000 |
| commit | c976437c7dba9c7444fb41df45468968aaa326ad (patch) | |
| tree | 7702267d658e721ce56838d8c3b216ffd65b40a4 /hw/xen/xen_pt_config_init.c | |
| parent | fe680d0dac85e0f2d6c3b53838c250f6e0b1f49b (diff) | |
qemu-xen: free all the pirqs for msi/msix when driver unload
Pirqs are not freed when driver unload, then new pirqs are allocated when
driver reload. This could exhaust pirqs if do it in a loop.
This patch fixes the bug by freeing pirqs when ENABLE bit is cleared in
msi/msix control reg.
There is also other way of fixing it such as reuse pirqs between driver reload,
but this way is better.
Xen-devel: http://marc.info/?l=xen-devel&m=136800120304275&w=2
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'hw/xen/xen_pt_config_init.c')
| -rw-r--r-- | hw/xen/xen_pt_config_init.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c index 8ccc2e4b9c..de9a20f437 100644 --- a/hw/xen/xen_pt_config_init.c +++ b/hw/xen/xen_pt_config_init.c @@ -1123,8 +1123,8 @@ static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s, msi->mapped = true; } msi->flags |= PCI_MSI_FLAGS_ENABLE; - } else { - msi->flags &= ~PCI_MSI_FLAGS_ENABLE; + } else if (msi->mapped) { + xen_pt_msi_disable(s); } /* pass through MSI_ENABLE bit */ @@ -1397,6 +1397,8 @@ static int xen_pt_msixctrl_reg_write(XenPCIPassthroughState *s, if ((*val & PCI_MSIX_FLAGS_ENABLE) && !(*val & PCI_MSIX_FLAGS_MASKALL)) { xen_pt_msix_update(s); + } else if (!(*val & PCI_MSIX_FLAGS_ENABLE) && s->msix->enabled) { + xen_pt_msix_disable(s); } debug_msix_enabled_old = s->msix->enabled; |