treewide: compare syscall.Errno directly instead of interface type
Change-Id: I03eba72177113cf40afc38981c5311a8013855f9
Reviewed-on: https://review.monogon.dev/c/monogon/+/3042
Reviewed-by: Leopold Schabel <leo@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/pkg/loop/loop.go b/metropolis/pkg/loop/loop.go
index a8be907..b302c0b 100644
--- a/metropolis/pkg/loop/loop.go
+++ b/metropolis/pkg/loop/loop.go
@@ -185,15 +185,15 @@
return nil, fmt.Errorf("failed to open device: %w", err)
}
var loopInfo loopInfo64
- _, _, err = syscall.Syscall(unix.SYS_IOCTL, potentialDevice.Fd(), unix.LOOP_GET_STATUS64, uintptr(unsafe.Pointer(&loopInfo)))
- if err == syscall.Errno(0) {
+ _, _, errNo := syscall.Syscall(unix.SYS_IOCTL, potentialDevice.Fd(), unix.LOOP_GET_STATUS64, uintptr(unsafe.Pointer(&loopInfo)))
+ if errNo == syscall.Errno(0) {
return &Device{dev: potentialDevice, num: loopInfo.number}, nil
}
potentialDevice.Close()
- if err == syscall.EINVAL {
+ if errNo == syscall.EINVAL {
return nil, errors.New("not a loop device")
}
- return nil, fmt.Errorf("failed to determine state of potential loop device: %w", err)
+ return nil, fmt.Errorf("failed to determine state of potential loop device: %w", errNo)
}
func (d *Device) ensureOpen() error {