OvmfPkg: QemuVideoDxe: tidy up error checking/handling in & under Start()
In QemuVideoControllerDriverStart():
- remove redundant zero-initialization of:
- Private->Handle (2 locations)
- Private->GopDevicePath (when at devpath end)
- remove fields used for error handling only:
- PciAttributesSaved
- tigthen scope of temporaries:
- MmioDesc
- AcpiDeviceNode
- supplement missing error checks:
- AppendDevicePathNode() can fail with out-of-memory (2 locations)
- when installing GopDevicePath
- retval of QemuVideoGraphicsOutputConstructor() (can justifiedly fail
with out-of-resources)
- plug leaks on error:
- free GopDevicePath (AppendDevicePathNode() allocates dynamically)
- uninstall GopDevicePath
- free Private->ModeData
- call QemuVideoGraphicsOutputDestructor()
- uninstall GOP
In QemuVideoGraphicsOutputConstructor(), called by Start():
- supplement missing error checks:
- QemuVideoGraphicsOutputSetMode() retval (it can fail with
out-of-resources)
- plug leaks on error:
- free Mode->Info
- free Mode
In QemuVideoCirrusModeSetup() and QemuVideoBochsModeSetup(), both called
by Start():
- supplement missing error checks:
- AllocatePool() can fail in both
In QemuVideoGraphicsOutputDestructor(), called by Start() on the error
path:
- plug leaks:
- free Private->LineBuffer, which is allocated in
Start() -> Constructor() -> SetMode()
In QemuVideoGraphicsOutputSetMode(), called by Start() indirectly:
- remove redundant zero-assignment to:
- Private->LineBuffer
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15282
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