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s390x/pci: Add missing initialization for g_autofree variables 

When declaring g_autofree variable without initialization, compiler
will raise "may be used uninitialized in this function" warning due
to automatic free handling.

This is mentioned in docs/devel/style.rst (quote from section
"Automatic memory deallocation"):

  * Variables declared with g_auto* MUST always be initialized,
    otherwise the cleanup function will use uninitialized stack memory

Add initialization for these declarations to prevent the warning and
comply with coding style.

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Fixes: cd7498d07f ("s390x/pci: Add routine to get the vfio dma available count")
Fixes: 1e7552ff5c ("s390x/pci: get zPCI function info from host")
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20210315101352.152888-1-mrezanin@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
master
Miroslav Rezanina 2021-03-15 11:13:52 +01:00 committed by Cornelia Huck
parent 1a3c443c43
commit 5793f5aafb
1 changed files with 3 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
hw/s390x/s390-pci-vfio.c
View File

@ -29,14 +29,11 @@
*/
bool s390_pci_update_dma_avail(int fd, unsigned int *avail)
{
g_autofree struct vfio_iommu_type1_info *info;
uint32_t argsz;
uint32_t argsz = sizeof(struct vfio_iommu_type1_info);
g_autofree struct vfio_iommu_type1_info *info = g_malloc0(argsz);
assert(avail);
argsz = sizeof(struct vfio_iommu_type1_info);
info = g_malloc0(argsz);
/*
* If the specified argsz is not large enough to contain all capabilities
* it will be updated upon return from the ioctl. Retry until we have
@ -230,7 +227,7 @@ static void s390_pci_read_pfip(S390PCIBusDevice *pbdev,
*/
void s390_pci_get_clp_info(S390PCIBusDevice *pbdev)
{
g_autofree struct vfio_device_info *info;
g_autofree struct vfio_device_info *info = NULL;
VFIOPCIDevice *vfio_pci;
uint32_t argsz;
int fd;