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pci: designware: Update MSI mapping unconditionally

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Expression to calculate update_msi_mapping in code handling writes to
DESIGNWARE_PCIE_MSI_INTR0_ENABLE is missing an ! operator and should
be:

    !!root->msi.intr[0].enable ^ !!val;

so that MSI mapping is updated when enabled transitions from either
"none" -> "any" or "any" -> "none". Since that register shouldn't be
written to very often, change the code to update MSI mapping
unconditionally instead of trying to fix the update_msi_mapping logic.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: qemu-devel@nongnu.org
Cc: qemu-arm@nongnu.org
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrey Smirnov 2019-07-01 17:26:15 +01:00 committed by Peter Maydell
parent 6ee51e961e
commit 4eb42b81c5
1 changed files with 2 additions and 8 deletions
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10
hw/pci-host/designware.c
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@ -297,16 +297,10 @@ static void designware_pcie_root_config_write(PCIDevice *d, uint32_t address,
root->msi.base |= (uint64_t)val << 32;
break;
case DESIGNWARE_PCIE_MSI_INTR0_ENABLE: {
const bool update_msi_mapping = !root->msi.intr[0].enable ^ !!val;
case DESIGNWARE_PCIE_MSI_INTR0_ENABLE:
root->msi.intr[0].enable = val;
if (update_msi_mapping) {
designware_pcie_root_update_msi_mapping(root);
}
designware_pcie_root_update_msi_mapping(root);
break;
}
case DESIGNWARE_PCIE_MSI_INTR0_MASK:
root->msi.intr[0].mask = val;