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msi: Guard msi/msix_write_config with msi_present 

Terminate msi/msix_write_config early if support is not enabled. This
allows to remove checks at the caller site if MSI is optional.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jan Kiszka 2012-05-11 11:42:39 -03:00 committed by Michael S. Tsirkin
parent cbd2d4342b
commit 7c9958b043
2 changed files with 3 additions and 2 deletions
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3
hw/msi.c
View File

@ -276,7 +276,8 @@ void msi_write_config(PCIDevice *dev, uint32_t addr, uint32_t val, int len)
unsigned int vector; unsigned int vector;
uint32_t pending; uint32_t pending;
if (!ranges_overlap(addr, len, dev->msi_cap, msi_cap_sizeof(flags))) { if (!msi_present(dev) ||
!ranges_overlap(addr, len, dev->msi_cap, msi_cap_sizeof(flags))) {
return; return;
} }

2
hw/msix.c
View File

@ -187,7 +187,7 @@ void msix_write_config(PCIDevice *dev, uint32_t addr,
int vector; int vector;
bool was_masked; bool was_masked;
if (!range_covers_byte(addr, len, enable_pos)) { if (!msix_present(dev) || !range_covers_byte(addr, len, enable_pos)) {
return; return;
} }